Rock Exotica Aztek Pulley Set (2 Pulleys, 1 Pin, 1 Cover) Aztek Pulley Set includes: 2 Aztek pulleys, 1 pin, 1 cover Max Rope Diameter: 8 mm Sheave Diameter: 1.0 (25 mm) Weight: 15.4 oz (436 gm) Certification: CE Breaking Strength (Each pulley): 2 x 9 kN x 2=36 kN Working Load: 2 x 2 kN x 2=8 kN