Rock Exotica Omni-Block 1.1" Pulley The Omni-Block combines a pulley with a swivel and offers tremendous advantages. It can replace a conventional pulley, carabiner & swivel and is lighter, less expensive and saves valuable vertical space Weight :5.1 oz (145 gm) Height: 4.4 (112 mm) Width: 2 (51 mm) Breaking Strength: 23kN Working Load: 5kN It also allows installing/removing the rope while the pulley is still anchored. Max Rope Diameter: 13 mm Sheave Diameter: 1.1 (28 mm) Certification: CE Pulley is small and compact