6-Pack Erlenmeyer Flasks with Cork Stoppers, 100mL, Borosilicate Glass Chemical_Copper (II) Carbonate Solid hardwood 15-place test tube

Solid hardwood 15-place test tube rack milled from a single block with slotted holes

and tubes during distillation and reflux

with pucks gliding nearly frictionless across a blue-graduated steel surface

and coil wire with step-by-step assembly instructions

the curved-face geometry letting beams enter along any radius for clean Snell's law angle work in ray-box and refraction setups

6-Pack Erlenmeyer Flasks with Cork Stoppers, 100mL, Borosilicate Glass Chemical_Copper (II) Carbonate Solid hardwood 15-place test tubePack of 6 narrow neck Erlenmeyer flasks in borosilicate glass holds 100mL with cork stoppers for chemistry and laboratory procedures.