S-Shape Test Tube Stand, Model B Glass Sets & Apparatus_Distillation Apparatus this 40-piece optical bench kit

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

Larger brass conductor cone on an insulated rod and base

ten 4 by 3-inch plane glass mirrors at ~2

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 this 40-piece optical bench kitAluminum S shape test tube stand designed for chemistry and biology benches, providing tiered storage that keeps tubes upright and visible during student experiments.