Series 20 ball bearing block - triple - 2-axis shackle headfeatures: low frictionhigh static and dynamic load capacitylightweightprecision molded acetal sheaves running on stainless steel or torlonâ ball bearings provide high performance & low frictiontwo-way head can be fixed at 0â° or 90â°applications: dinghy control linesdinghy vangscunninghamstraveller controlsmaterials: stainless steel ball bearingsuv stabilized acetal sheavegrade 316 stainless steel load strap and head fittingimpact and uv resistant, fiber reinforced nylon cheeksspecifications: sheave ã˜: 20mm(3/4")max. Rope ã˜: 6mm(1/4")pinã˜: 4mm(5/32"). : 400kg(880lbs)b. L. : 850kg(1, 870lbs)weight: 62g()