Comparison scale -- for weigthed math number blocks
thingiverse
Scale/Balance for comparing weighted number blocks; useful in teaching math comparison and pre-algebra. The scale features suction cup feet with a diameter of 20mm, but the "legs" can be easily bolted to a more substantial base of your choosing. The assembled parts include M3x5 bolts (top/arm) and M3x8 bolts (bottom/legs), which are essentially self-tapping. This scale is compatible with weighted number blocks - Slide version: https://www.thingiverse.com/thing:2517546 A Magnetic version will be available soon. For affordable suction cups, 20mm in diameter, visit: http://www.ebay.com/itm/50PCS-Clear-Transparent-Hanger-Kitchen-Bathroom-Suction-Cup-Sucker-20mm/311566424293?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2060353.m2749.l2649
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