This pulley is designed to be used in rescue work or hauling good for hostile environments and uses no nylon parts. The pulley features two large carabiner rigging points on wide skirted side plates of blue anodized aircraft aluminum. Aluminum pulley sheave is permanently sealed with lubricated needle bearings for smooth operation and long life. Measures 4.5 x 3 with a sheave diameter of 2.375. The Sheave rides on a hardened axle which has been ground for maximum durability.