Rock Exotica Mini Machined Pulley - Double Rock Exotica made in the USA machined pulleys are milled from solid 7075 aluminum so we can take material away where its not needed and leave it where it is. Breaking Strength: 2 x 9 kN x 2=36 kN Working Load: 2 x 2kN x 2=8 kN Max Rope Diameter: 11 mm Sheave Diameter: 1.1 (21 mm) The axle is machined as part of the side plate, allowing us to use a flush head axle screw. Certification: CE, UIAA Weight: 5.0 oz (141 gm) Size: 2 1/2" inch wide x 4" inch tall x 1 1/2" deep