Pulley, Quadruple Parallel Plastic, Pack of 15

GSC International 4-16064-15 Quadruple Parallel Pulley, Plastic, Pack of 15 This black plastic pulley has four wheels in parallel that are 50mm in diameter. It has a metal housing and hooks at the top and the bottom. Sold in a pack of 15. Four-Wheel Parallel Design – Features 4 plastic wheels aligned side by side for exploring compound pulley systems and balanced load distribution. Sturdy Metal Frame – Rugged metal housing ensures durability and stability during repeated classroom use and experimentation. Perfect for Physics Labs – Supports lessons on mechanical advantage, force redirection, and Newtonian mechanics through hands-on engagement. Smooth, Low-Friction Operation – Plastic wheels rotate freely for efficient demonstrations and accurate results in experiments. ⚠️ Proposition 65 Warning for California Residents: WARNING: This product may expose you to chemicals including styrene and/or bisphenol A (BPA), which are known to the State of California to cause cancer, birth defects,