Black Diamond Climbing 9.9 mm Rope-Dual Blue-60. 9 is our go-to rope for year-round rock climbing. Boasting a thick diameter built for day in day out use the 9.9 is optimized for durability yet soft enough to deliver great handling. Sporting an easily identified middle marker the BD 9.9 is ideal for climbers who prefer packing one burly rope for all rock projects. Specifications for Black Diamond Climbing 9.9 mm Rope: Manufacturer: Black Diamond Color: Dual Blue Impact Force: 8.4 kN Weight: 2.3 oz Treatment Type: Non-Treated Diameter: 9.9 mm Rope Diameter Range: 9.6 - 10 Rope Type: Single Dynamic Features of Black Diamond Climbing 9.9 mm Rope Regular Sheath: Utilizing a 2X2 weave construction our standard sheath is built to withstand everyday use Durability and Handling Balance: Purpose-built to balance both durability and great handling our ropes are not too stiff and not too soft giving you a great feeling rope that knots easily feeds through your belay device with ease yet holds up to a barrage of use Black Diamond Climbing 9.9 mm Rope-Dual Blue-60