Wooden Test Tube Support, 15-Place Glass Sets & Apparatus_Organic Chemistry Sets Fifteen-frame pulley block assembly set

Fifteen-frame pulley block assembly set with five each of single

Designed for larger-volume Snell's-law work

Copper-block plug key switch with two 4mm terminals and a removable plastic-guarded plug

Three-wire setup pairs a 100N spring-balanced string

relating photon frequency to the kinetic energy of emitted electrons for quantum physics investigations

Wooden Test Tube Support, 15-Place Glass Sets & Apparatus_Organic Chemistry Sets Fifteen-frame pulley block assembly setSolid hardwood 15 place test tube rack milled from a single block with slotted holes, keeping tubes up to 13 mm upright on the bench during student experiments.