The Petzl Gemini double pulley is equipped with an auxiliary attachment point for use in technical hauling systems.Certification(s): CE EN 12278, UIAA. Lightweight (aluminum side plates and sheaves). Sheave mounted on sealed ball bearings for excellent efficiency. Parallel mounted sheaves and auxiliary attachment point for creating different types of hauling systems, including the most complex. Special side plates designed for use with a Prusik friction hitch in lightweight progress capture systems.Date First Available: January 12, 2004. Best Sellers Rank: #296,261 in Sports & Outdoors. Customer Reviews: 5.0 out of 5 stars 19 ratings 5.0 out of 5 stars. : B0035PHB40. Batteries Required?: ?No. Batteries Included?: ?No. Included Components: ?Pulley. Usage: ?Climbing, ice climbing, mountain climbing, rescue climbing, skiing, snowshoeing, snowboarding, caving, ice rescue, mountain rescue, spelunking, rapping, rappelling, cave diving, belaying, abseiling, sport climbing, football, hockey, tennis, baseball, lacross, track, rock climbing, winter sprots, construction, cross country, soccer, hiking, camping, cycling, outdoor, zipline, zip line, adventure climbing, rock climbing, aerial, aerial dancing, dancing, aerial silk, aerial performance, aerial lessons, aerial equipment, aerial hardware, aerial kit, trapeze, aerial trapeze. Measurement System: ?US. Item Package Quantity: ?1. Pattern: ?Gelb / Schwarz - Gelb - Schwarz. Material: ?#N/A. Color: ?#N/A. Size: ?One Size. Is Discontinued By Manufacturer: ?No. Item model number: ?P66A. Country of Origin: ?France. Product Dimensions: ?5.5 x 3.5 x 2 inches. Item Weight: ?4.8 ounces. Part Number: ?P66A. Manufacturer: ?Petzl.