The ORBIT Series 40 block features a carbon fiber, PTFE impregnated nylon sheave, high compression strength carbon black Acetal ball bearings, and glass fiber reinforced nylon frames. A high performance, low profile and extremely low friction block at a great price point.Also features a becket, swivel shackle head and an under-hung adjustable carbon fiber C-Cleat. For jibsheets on catamarans and dinghies up to 20' (6.1mm) and mainsheet systems and spinnaker sheets on boats up to 16' (5m).316 Stainless Steel & Carbon Fiber Reinforced NylonMax Line Size: 5/16” (9mm)Shackle Pin Diameter: 3/16” (5mm)Sheave Diameter: 1-9/16” (40mm)Weight: 3.7 oz (105g)Max Working Load: 715 lb (325kg)*Breaking Load: 1540 lb (700kg)* Total block load. Becket MWL 275l b (125kg), BL 550 lb (250kg)(suitable for 3:1 system at rated block load)* Line load through cleat not to exceed 275 lb (125kg)
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