Gunther Expansion Apparatus, Brass Waves & Oscillation_Sound & Resonance Three-wheel parallel pulley in a

Three-wheel parallel pulley in a metal frame with accurately-centered 50mm aluminum wheels

Beech wood test tube rack holds 12 tubes up to 20mm diameter in a 9-inch frame for organized storage during chemistry and biology experiments

Short 150mm red 2mm-stackable lead with nickel-plated pins on both ends

Tensioner pulley keeps chain engagement consistent on this hand-cranked chain drive

the lower-forward-voltage counterpart to the silicon unit for radio-detection demonstrations

Gunther Expansion Apparatus, Brass Waves & Oscillation_Sound & Resonance Three-wheel parallel pulley in aGlass jacketed twin rod Gunther expansion apparatus with 0. 01mm spherometer and electrical contact trigger, supplied with copper, brass, and iron rods for precise expansion measurement.