FEATURES of the Petzl Tandem Speed Pulley Stainless steel sheaves for excellent durability Sheave mounted on sealed ball bearings for excellent efficiency Accepts up to three carabiners to facilitate use SPECIFICATIONS of the Petzl Tandem Speed Pulley Weight: 270 g Case Quantity: 10 Rope Diameter: Maximum: 13 mm Cable Diameter: Maximum: 12 mm Sheave Type: Sealed ball bearings Sheave Diameter: 27.5 mm Efficiency: 91% Working Load: 10 kN Breaking Strength: 24 kN Certification (s) : CE EN 12278 - UIAA ALL CLI...