Yale Safari Dual Purpose Climbing Line – Meet Yale’s Kernmaster, a 48-strand Kernmantle rope with an outer polyester jacket over an energy-absorbing nylon core. Makes an excellent Single Rope Technique or System (SRT/SRS) line. FEATURES • Very low stretch and works smoothly in all of Single Rope hardware. SPECS Diameter 7/16" | 11.7 mm ABS 7,100 lbs | 3,220 kg Construction 48 Strand Kernmantle Cover/Core Polyester/Nylon Elongation at 10% 3% Weight 5.5 lbs per 100' | 2.5 kg per 30 m Spliceable No, Sewn |