Tethrd Tether Rope Brown TT8. 8mm ropes work with Kong Duck Ascenders. The world?s first commercially available 8mm rope with a factory spliced eye. Spliced eyes also reduce the weight and bulk of the rope by eliminating big knots and are much stronger than knots by anywhere from 30percent-50percent. Specifications for Tethrd Tether Rope: Manufacturer: Tethrd Color: Brown Features of Tethrd Tether Rope: Includes 8? rope with one 5? factory-spliced eye 1 ultra lite carabiner and prusik cord Weight: 5.6 ounces Strength: 9000 lbs Size: 8mm x 8? double braid DynaLite Core 5? Factory-spliced eye Package Contents: Tethrd Tether Rope Tethrd TT8: Tether Rope Brown