S-Shape Test Tube Stand, Model B Glass Sets & Apparatus_Distillation Apparatus 5cm inner and 4

5cm inner and 4

Larger brass conductor cone on an insulated rod and base

Mounted light-dependent resistor with terminal connections

this 40-piece optical bench kit pairs an aluminum track and sliding holders with lamp

One-ohm reference resistance coil non-inductively wound from double silk-covered constantan on a plastic rod inside a transparent housing with two terminals at plus-or-minus 1% accuracy

S-Shape Test Tube Stand, Model B Glass Sets & Apparatus_Distillation Apparatus 5cm inner and 4Aluminum S shape test tube stand designed for chemistry and biology benches, providing tiered storage that keeps tubes upright and visible during student experiments.