Petzl Gemini Prusik Pulley One Size. Specifications for Petzl Gemini Prusik Pulley: Manufacturer: Petzl Fabric/Material: Aluminum side plates aluminum sheave mounted on sealed ball-bearings Weight: 4.76 oz Breaking Strength: 23 kN Rope Capacity: 7 - 11 mm Working Load Weight: 6 kN (1.5 kN on one rope end) Pulley Type: Prusik Features of Petzl Gemini Prusik Pulley Special side plates designed for use with a Prusik friction hitch in lightweight progress capture systems Parallel mounted sheaves and auxiliary attachment point for creating different types of hauling systems including the most complex Sheave mounted on sealed ball bearings for excellent efficiency Lightweight (aluminum side plates and sheaves) Package Contents: Petzl Gemini Prusik Pulley Petzl P66A: Gemini Prusik Pulley One Size