The TANDEM SPEED double pulley is designed for Tyrolean traverses on rope and cable, and has stainless steel sheaves mounted on sealed ball bearings for excellent efficiency. � Maximum allowable speed: 20 m/s � Rope compatibility: diameter: 13 mm or less � Cable compatibility: diameter: 12 mm or less � Sheave diameter: 27,5 mm � Ball bearings: yes � Efficiency: 95 % � Maximum working load: 10 kN � Breaking strength: 24 kN � Certification(s): CE EN 12278, UIAA