![Ronstan Series 25 Utility Block - Single - Swivel Shackle Head [RF573]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/1280x1280/products/11307/13508/55259XL__50724.1601520364.jpg?c=2 "Ronstan Series 25 Utility Block - Single - Swivel Shackle Head [RF573]")
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 Ø: 25mm(1")
Max. Rope Ø: 6mm(1/4")
Pin Ø: 4mm(5/32")
M.W.L.: 150kg(330lbs)
B. L.: 300kg(660lbs)
Weight: 20g(0.7oz)
![Ronstan Series 30 Utility Ball Bearing Block - Single, Swivel Shackle Head [RF30100]](https://cdn11.bigcommerce.com/s-e6ht4dde3g/images/stencil/500x659/products/18835/22261/72397XL__65407.1601534646.jpg?c=2 "Ronstan Series 30 Utility Ball Bearing Block - Single, Swivel Shackle Head [RF30100]")