Ronstan Series 19 single tube rivet block. Stainless steel cheeks and Acetal sheaves ensure a long service life with virtually no maintenance. Hollow rivets accept fixing screws, shackles or can be used to add a becket for extra purchase. Lightweight durable construction. Economical and maintenance free. Use for vang, cunningham and trapeze retriever systems on dinghies and leech line tackles, bunk adjusters etc on larger yachts. Made from U.V. stabilised Acetal sheaves and Marine Grade 316 stainless steel cheeks. Dimensions: Sheave ? 20 mm Max. Rope ? 5 mm M.W.L. 150 kg B. L. 450 kg Weight 10 g