Series 30 Block - Single - Loop TopFeatures: Maintenance free Economical Lightweight durable construction Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance Hollow rivets in the block heads can be fitted with shackles, which can also be used to add a becket for extra purchase Applications: Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bunk adjusters etc on larger yachts Materials: UV Stabilized Acetal sheave Grade 316 stainless steel cheeks Specifications:Sheave ;:29mm(1-1/8")Max. Rope ;:8mm(5/16")M.W.L.:300kg(660lbs)B. L.:600kg(1,320lbs)Weight:20g(0.7oz)