4mm socket for sale, brand-new and used.

Digital Power Supply, 2 x 0 - 30 V/0 - 5 A DC/3.0 - 6.5 V DC/3 A DC fixed/8.0 - Digital Power Supply, 2 x 0 - 30 V/0 - 5 A DC/3.0 - 6.5 V DC/3 A DC fixed/8.0 - 15 V DC/1 A DC fixed

This is a custom set that I've put together. All the pieces are in great shape, some are unused. Comes with a nice tray and 3 rails, for placing in your tool chest.

THE MOST IMPORTANT THING!!!

UNLEASH YOUR INNER ROBOT MASTER. Makeblock is an aluminum extrusion based construct platform that can be used to bring your creations to life. With Makeblock you can make professional and steady robots.

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Makeblock Educational Ultimate Robot Kit - Blue Radio Shack Description:This is a comprehensive robot kit for beginners to explore the robotic world or experts to build complex robots. It contains everything you need to construct your robot dreams: metal geared motors, Arduino-compatible controller, programmable RGB LED strip, different kinds of sensors, robotic gripper and other mechanical parts.It is also great for learning Arduino and Scratch programming.