45 x 1/2 for sale, brand-new and used.

Note: we'll ship this item via express mail service to USA, Canada, Australia, New Zealand, Ireland, Austria, Belgium, Denmark, Germany, France, Finland, Luxemburg, Malta, Norway, Sweden, Swiss, Spain, Italy, UK, Japan, Korea,Thailand, Malaysia, Indonesia, Philippine, Singapore. Clients from other countries pls contact with us in advance to confirm the different shipping charges before you bid.

I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806

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DXL360S Digital Protractor Incli DY6013G Capacitor Capacitance Tester Meter up to 20000uF

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This item is brand new. It was received as a gift and I really don't have any use for it. From what I know about meters, this is an awesome tool.

45-55 Hz 220V Analog Panel Frequency Meter Hertz Indicator for System Monitoring

Features: Check the color difference between two samples. Color difference displayed ?(L*,a*,b*) ?(E*ab,C*ab, H*ab) ?(Y, x, y) ?(X, Y, Z) or ?(Rs, Gs, Bs) Color space displayed (L*, a*, b*) (L*, C*ab, hab) (Y, x, y) (X, Y, Z) or (Rs, Gs, Bs) Maximum, Minimum and Avera