Tandem pulleys are ideal for giving students a clear picture of mechanical advantage and velocity ratio in a pulley system. They are also easier to set up than traditional pulley blocks. These economy pulleys feature free-running plastic sheaves, aluminum frames, and suspension hooks at both ends. Available as single, double, or triple sets. Sheave diameters are 50mm (all models,) 40mm (triple and double,) and 30mm (triple)
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