Electrostatic Friction Rod Kit, includes: -3 fabric cloths (wool, cotton, silk) -3 rods (glass, ebonite, lucite), provides the necessary tools to free both positive and negative charges for exploration into electrostatic forces, 0.4 lbs, 9.8x6.0x1.8in
Pulley, Triple Sheave, Pulleys wheels are made of plastic and mounted securely in an aluminum housing with a hook on both the top and bottom for suspension, Size: 50mm