Filter Setup w/Pump, 2000mL Glass Flask, 125mm Buchner Funnel, Stopper and Filte 2000mL Filter Setup w/Buchner Funnel, Filter Paper & Rubber Stopper by OnlineScienceMall With its 2000mL borosilicate glass filter flask and 125mm porcelain buchner funnel, this filtration setup is perfect for use in vacuum filtration. Filtration is a technique by which a solid product is separated from an aqueous solution by pulling the liquid through the filter paper. In this setup, a piece of 12.5cm filter paper is placed in the buchner funnel, and allows the filtrate (liquid) to pass through into the flask, while the precipitate remains on top of the paper. A custom drilled rubber stopper is included with this setup to hold the funnel in place above the flask. By using a vacuum hand pump (not included) or a vacuum system (not included), the filtrate is much more easily separated from the precipitate, by pulling as much liquid through as possible. There will be some moisture left in the sample, so it is advisable to allow the sample to dry completely before using it in your application. Using a vacuum rather than gravity filtration allows for a variable filtration rate based on the strength of the pump being used, though care must be taken to not use a vacuum strong enough to rip the filter paper or break the flask. This setup is capable of performing gravity filtration in the absence of a vacuum pump or system. The included hand vacuum pump made of a durable polychloroethylene plastic, and can easily provide a vacuum of 25-27in/Hg by pumping its handle. The pumping rate is about 15ml per stroke. By changing its working mode, the pump can be used to establish air pressure as high as approximately 2 atm. The pump itself is sealed and self lubricated, and comes with approximately 2 feet of clear rubber tubing to attach to the filter flask. This filtration setup includes one each of the following items: 2000mL borosilicate glass filter flask 125mm buchner funnel 12.5cm filter paper **may need to be lightly wetted with water to fit properly into the buchner funnel 1 vacuum hand pump (without gauge) 1 rubber stopper, custom drilled Shipping Payment Returns About Us For orders within the Contiguous United States (not available for Hawaii, Alaska, US Territories or International destinations) we use one price shipping: take the single highest shipping charge from all the items you have bought and that is your shipping. i.e. If you buy 50 items and the highest charge is $ 8.95 on any item, that is your total shipping charge. This will save you money and simplify the checkout process. Buy what you want for one single low-priced shipping charge. All of our shipping fees include insurance, tracking, handling and packing. Please read below for international shipping policies, this policy does not apply to international. We will ship either UPS or USPS, our choice. This policy does not apply to the states of Alaska or Hawaii, nor does it apply to US Territories. If you have a preference of shipping, please specify in the notes and we will try to accomodate or we will contact you. When email addresses are provided, customers can expect email notification and tracking numbers. All shipments are insured based on approximate value of the contents. If you do not hear from us for any reason, please contact us, so that you receive the service you expect. We will inform you of any back orders. We try our best to have a perfect inventory and ship promptly, but sometimes mistakes happen. If delivery time is an issue for you please contact us through the E-Bay Contact Seller Form. If a package is refused or undeliverable, UPS charges us a fee. If it is your mistake, we will ask for reimbursement for the extra shipping. Please double check your address to be sure that it is correct International Shipping Policy Our program estimates all international shipping by destination, weight and size of package. Sometimes combined international orders on eBay can calculate shipping incorrectly. If you have concerns, please contact us and we will double check the shipping and correct if neccesary. Shipping quotes always include insurance and a small handling charge. The listing will have a disclaimer if we do not ship that item internationally. If you have a question about shipping an item to your country, please email. We carry a huge variety of merchandise in weight and size and the USPS has different size and weight regulations for different countries. Please realize that international shipping is expensive and consider your purchase carefully because all international shipping fees are non-refundable. The time table for international shipping is not always reliable, please do not blame us if it takes longer than expected to arrive. Please check with your post office and customs to see if it has arrived. Many times a lost package is at the post office. Each country has different fees and policies. You are responsible for all customs fees when your package arrives. We also can not list your package as a gift or sample on the customs form for legal reasons. We ship internationally twice weekly We accept and prefer PayPal. Sales Tax is applicable in the following states: Alabama. Welcome to OnlineScienceMall (a division of MacNan Biologicals)...the source for all your scientific needs. We pride ourselves on fast shipping, personalized service, competitive pricing and product diversity. A look at our catalog will show that we specialize in a large line of general scientific equipment and supplies. Our goal is to provide the material support that will bring out the scientist in every person. OnlineScienceMall's large and expanding inventory allows us to meet the needs of a very diverse customer base. From individual home schoolers to curriculum refurbishments for entire city systems, from herb gardens to corporate laboratories, and from kindergartens to university research centers, we work hard to fulfill everyone's needs. Thirty years experience in the business of science education provides our customers with a confidence that we can deliver quality science supplies backed with service. Our inventory is sourced from around the world. Your guarantee of satisfaction, however, resides right here at home. Customer satisfaction is a priority. Our customers write: "The first order I gave you was to pull me out of a jam. Though it was a very small order, I was treated like I was your biggest client...I find I have been treated the same each and every time since." Much of the success of our business can be attributed to Mike McNamara, our Science Education Director. Mike has thirty years experience in almost every area of the science education field. He has worked in the lab, in the classroom, in government research and national sales. His background is in science, and he has been in the lab supply business since 1976. Currently Mike is in charge of product development at Macnan Biologicals and OnlineScienceMall, but still finds time for teacher training and curriculum development for school systems. He can be of service to you too if you contact him. Here at Online Science Mall, we want you to love what you've ordered. However, we do understand that every once and a while things just don't quite work out for one reason or another and you'd like to return it for a refund or exchange. The following will outline our policy on returns, refunds or exchanges. If there are any questions about our policies, please contact us through the Contact Us link. When returning an item for either a refund or an exchange, please be sure to include a copy of your invoice or packing slip. Doing this will allow us to expedite the processing of the returned merchandise. If a packing slip or invoice is not included, an additional 3-4 days may ensue as we try to track down your purchase in our order management system. Please note that there are some exceptions to the refund policy: Pre-poured agar, due to its perishable nature, is non-refundable. Special orders, due to the time we put into tailoring something to your specific needs, are non-refundable. Returns & Refunds *All returns must be made within 30 days, and be either unopened or in original condition and include the original packaging. *The customer is responsible for any fees associated with returning merchandise. The only exception to this is if the reason for the return is due to an error on our part, or the part of one of our suppliers. Should this occur, we will refund the cost of shipping back to us. *Refunds are generally processed 3-4 business days after the item has arrived at our facility. Please note that this time-frame does not include the length of time it takes UPS or USPS to deliver your item(s) to us. *A restocking fee maybe applied in special instances. A refund of the purchase price minus the cost of shipping will be refunded to the customer. Exchanges To exchange an item for something else, please be sure to read over the Returns & Refunds policy above. For all exchange, the customer is responsible for the costs associated with returning the undesired item, as well as the cost of shipping out the new item. If the new product has a lesser value than the original, a refund will be applied to the customer's account. If the new product has a greater value than the original, the customer will be responsible for paying the remaining balance. Please note that the new items will not be shipped until the original item has been returned to our facilities. Warranties Warranty repairs on equipment must be handled according to the warranty requirements of the different manufacturers, and may require that the items be sent to them, not Online Science Mall. The customer is responsible for contacting the manufacturer, and arranging warranty repairs/services.