![Ronstan Series 25 Utility Block - Single, Becket, Loop Head [RF572]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-25-utility-block-single-becket-loop-head-rf572.webp)
Series 25 Utility Block – Single, Becket, Loop Head
Features:
- Lightweight durable construction
- Economical
- Maintenance free
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 sheaves
- Grade 316 stainless steel cheeks
![Ronstan Race Sheave - Acetal Solid Bearing - 66mm (2-5/8") OD [RF1765]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-race-sheave-acetal-solid-bearing-66mm-2-5-8-od-rf1765.webp)
![Ronstan Series 20 Ball Bearing Block - Triple - Becket - 2-Axis Shackle Head [RF20312]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-20-ball-bearing-block-triple-becket-2-axis-shackle-head-rf20312.webp)
![Ronstan Series 20 Ball Bearing Block - Single - Loop Top [RF20101]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-20-ball-bearing-block-single-loop-top-rf20101.webp)
![Ronstan Race Sheave - Acetal Solid Bearing - 50mm (1-15/16") OD [RF1759]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-race-sheave-acetal-solid-bearing-50mm-1-15-16-od-rf1759.webp)
![Ronstan Series 30 Fiddle Block - Narrow w/Tube Rivot Head [RF186]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-30-fiddle-block-narrow-w-tube-rivot-head-rf186.webp)
![Ronstan Kite Block - Black w/White Sheave (Pair) [RF13101-2]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-kite-block-black-w-white-sheave-pair-rf13101-2.webp)
![Ronstan Series 30 Block - Single - Loop Top [RF280]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-30-block-single-loop-top-rf280.webp)
![Ronstan Series 20 Ball Bearing Block - Single - Cheek [RF20151]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-20-ball-bearing-block-single-cheek-rf20151.webp)