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

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

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

Sodium chloride lattice kit with 27 color-coded gray and green atoms plus 54 connectors for building the full cubic NaCl crystal structure in three dimensions

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.