2.125" Cast Iron Closed Ring with Boss Head Clamp Science at Home_Elementary Science providing the lowest-value reference in

providing the lowest-value reference in the line for low-resistance Ohm's-law and bridge work

Highly-detailed digestive canal model isolates the GI tract from surrounding organs to expose mucosal and muscular layers along the full length of the canal

letting students physically form anticlines

Wooden-frame abacus on a 13

this wool cloth is a standard accessory for electroscope and Van de Graaff work

2.125" Cast Iron Closed Ring with Boss Head Clamp Science at Home_Elementary Science providing the lowest-value reference inCast iron closed ring clamp with an integrated boss head, combining a 2. 125 inch outer ring and a thumbscrew rod grip from 5 16 to 5 8 inch for small apparatus support.