Nylatron Sheave Box - Single Upright Lead BlockLead blocks are a low profile solution for leading halyards or other rig sail controls back to cleats or jammers.When mounted in an inverted position, are frequently used as upright leads.Features:The external tabs can be formed to fit the spar profile before fasteningApplications:Typically used in dinghy spars for control lines such as outhaulsMaterials:NylatronA(R) sheaveGrade 316 stainless steel load housingSpecifications:Sheave : 22mm(7/8)Max. Rope : 3mm(1/8)Max. Cable : 3mm(1/8)Fastener : 5mm(3/16)M.W.L.: 160kg(350lbs)B. L.: 350kg(700lbs)Weight: 30g(1.1oz)