Description: Material: Aluminum,Sheave:Stainless steel. You could use it in hauling, dragging, tensioning system, in rescue, tree climbing, and etc. Smooth rotation provides maximum mechanical advantage. Rating to 20kN / 4409lbs for high durability to satisfied all your requirements, Light and compact, the micro pulley will take up almost no space in your rack. Specification: Size:8.2cmx4.4cm Diameter:16mm Max. rope compacity: 13mm Breaking Strength: 20kN / 4409lbs Net weight: 140g / 4.9oz Max. diameter of rope: 8-13mm Certification: CE1019 Package Includes: 1 x Climbing Pulley