Yates Mountain Lite Pulleys are designed to maximize strength while reducing weight. A new standard for high strength, lightweight pulleys. The Yates Mountain lite pulleys offer a weight reduction of up to 35% over pulleys of similar size. Yates designed these specifically for mountain rescue and USAR applications when a lightweight, NFPA G certified pulley is needed. The Mountain Lite pulley is made using aircraft quality aluminum, this design features a 2.5 inch sheave (full, true 2 inch tread diameter). This diameter sheave is the best compromise for aximizing efficiency while reducing weight and bulk. Unique channel milled into the side of the sheave reduces the effect of debris building up between it and the side plate. Side plate design allows the use of larger ropes in a compact pulley. Manufactured exclusively for Yates by SMC. This mountain lite pulley is certified to NFPA G 1983/2006 ed. Weight 8.5 oz. single, 15 oz. double.