Assorted Steel Spring Set Disposable_Disposable Built-in launch-height scale on a

Built-in launch-height scale on a 21-inch loop apparatus lets students release a 0

Rotary pipette stand holds 94 pipettes vertical with an open-bottom base for rapid draining after washing in high-throughput glassware cleanup

and arid environment survival features for ecology and animal behavior teaching

the 90-45-45-degree faces redirecting light through right angles for TIR demos

German pattern brass cork borer set includes 6 sizes from 4-10mm for creating precise holes in cork and rubber stoppers

Assorted Steel Spring Set Disposable_Disposable Built-in launch-height scale on a150 spring assortment mixing compression and extension types, lengths from 15mm to 300mm, for open ended exploration of Hooke's law, simple harmonic motion, and stored potential energy.