Double pulley for use with ropes The TANDEM is designed for smooth and efficient Tyrolean traverses on rope. Sheaves mounted on self-lubricating bushings for good efficiency Maximum allowable speed: 10 m/s Attachment point accepts up to three carabiners to facilitate use Specs: Weight: 195 g Max. rope diameter : 13 mm Sheave diameter : 21 mm Efficiency: 71 % Working load : 10 kN Breaking strength : 24 kN Reference: P21 Certification(s): CE EN 12278, UIAA Made in : FR Guarantee: 3 years