Assorted Steel Spring Set Disposable_Disposable Rotary pipette stand holds 94

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

Fan-shaped end scrubs vessel bottoms on this 16

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

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

Assorted Steel Spring Set Disposable_Disposable Rotary pipette stand holds 94150 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.