Sterling Rope Single Rescue Pulley - The SR Rescue Pulley is compatible with ropes up to 13mm and works great where a simple redirect is needed. All Sterling Rope pulleys are constructed from high-strength aluminum side plates and a sealed ball bearing sheave that helps keep out dirt and grit. Max Rope Diameter: 13mmMBS (kN): 32kNSheave Construction: AluminumSheave Diameter: 1.5inType: SingleWeight: 190g