This factory sewn Prusik Loop is made from 8mm cord. The computerised stitching is covered with clear heat shrink. This protects the stitching and creates a closed eye for connection to the harness. The sewn connection eliminates bulky knots and improves the strength of the Prusik Loop.ï¿½ï¿½Available in two common lengths of 400mm and 550mm.ï¿½ï¿½Rated Strength: 26.21kNï¿½ï¿½Warning: Test your new Prusik Loop at ground level prior to use at height. Determine if the cord type, construction and diameter are compatible with the climbing rope being used.