Hand Made Wooden Test Tube Spice Rack with 12 Borosilicate Glass Test Tubes, 6 inch Clearance Triple tandem plastic pulley with

Triple tandem plastic pulley with 25/38/50mm ball-bearing wheels on an open-sided 17

Beech wood test tube rack accommodates 13 tubes up to 25mm diameter in a 10

Designed to measure Planck's constant through the photoelectric effect

Polyhedral 120mL glass alcohol lamp ships with a metal cap and fiber wick for low-temperature bench heating in chemistry and biology demonstrations

Hand Made Wooden Test Tube Spice Rack with 12 Borosilicate Glass Test Tubes, 6 inch Clearance Triple tandem plastic pulley withHandmade wooden spice rack holds twelve 6 inch borosilicate glass test tubes with caps and includes a filling funnel for kitchen to lab cross over gifting.