Overview Reviews Similar Products –> Product Description Series 25 Utility Block – Single – Swivel Shackle Head 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. Features: Lightweight durable construction Economical Maintenance free Applications: Vang, cunningham and trapeze retriever systems on dinghies Leech line tackles, bunk adjusters, etc on larger boats Materials: U.V. stabilized acetal sheaves Grade 316 Stainless Steel cheeks Specifications: Sheave : 25mm(1″) Max. Rope : 6mm(1/4″) Pin : 4mm(5/32″) M.W.L.: 150kg(330lbs) B. L.: 300kg(660lbs) Weight: 20g(0.7oz) Product Videos Custom Field Product Reviews Write a Review Write a Review Ronstan Ronstan Series 25 Utility Block – Single – Swivel Shackle Head Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *