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:Nylatron 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)