![Barton Marine Stand Up Block - Size 3 [25 310]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/barton-marine-stand-up-block-size-3-25-310.webp)
Stand Up Block – Size 3
Has a stainless eye fitted to a stainless loop,through-bolted for strength. The moulded plastic spring/gaiter prevents the block tumbling or ropes snagging.
Specifications:
- Length: 80mm (3.15″)
- Width: 42mm (1.65″)
- Height: 120mm (4.72″)
- Sheave: 45mm (1.77″)
- Max. Rope: 10mm (0.40″)
- Break Load: 980kg (2,161lbs)
- SWL: 490kg (1,080lbs)
- Weight: 223gr(7.8oz)
![Ronstan Series 20 Ball Bearing Block - Upright Lead [RF20171]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-20-ball-bearing-block-upright-lead-rf20171.webp)
![Ronstan Series 30 Fiddle Block - Narrow w/Tube Rivet HeadV-Jam Cleat [RF187]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-30-fiddle-block-narrow-w-tube-rivet-headv-jam-cleat-rf187.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 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 Race Sheave - Acetal Ball Bearing - 28mm (1-1/8") OD [RF1020]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-race-sheave-acetal-ball-bearing-28mm-1-1-8-od-rf1020.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)
![Ronstan Series 20 Ball Bearing Block - Double - Becket - 2-Axis Shackle Head [RF20212]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-series-20-ball-bearing-block-double-becket-2-axis-shackle-head-rf20212.webp)
![Ronstan Wire Block - Tubular Rivet Head w/Removable Nylatron Sheave - 45mm (1-3/4") Sheave Diameter [RF103]](https://www.yachtseatworks.com/wp-content/uploads/2026/10/ronstan-wire-block-tubular-rivet-head-w-removable-nylatron-sheave-45mm-1-3-4-she.webp)