Straight Cone to Flexible Tubing Rotaflow Stopcock Adapter, 29/32 Cone, Borosilicate Glass Base Shape_Rectangular The item measures 21" in

The item measures 21" in height when positioned upright and is designed with a PTFE key stopcock that allows optimal control of flow when working with liquids in the lab

Glass double-concave lens at 50mm diameter and 100mm focal length

spectral-line

and a right-side zero reset

230mm disc graduated 0-360 degrees in 1-degree steps locks in any position alongside a rotatable lamp house and six magnetic acrylic elements for full ray-tracing studies of reflection and refraction

Straight Cone to Flexible Tubing Rotaflow Stopcock Adapter, 29/32 Cone, Borosilicate Glass Base Shape_Rectangular The item measures 21" inStraight cone to flexible tubing Rotaflow stopcock in borosilicate glass provides controlled flow between ground joint apparatus and rubber tubing.