![SeaSure 25mm Treble Block w/Shackle [00.31CRD]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/seasure-25mm-treble-block-w-shackle-00-31crd.webp)
25mm Treble Block with Shackle
The 25mm plain bearing block range is one of SeaSure’s oldest and best-selling ranges. The range uses marine-grade stainless steel side plates and rivets with an arnite (plastic) sheave, which is incredibly hard-wearing and light.
Features:
- This range could be used to create purchasing systems for lifting, garage door mechanisms, storage solutions, etc.
- The 00.31 can be used to create a 6:1 purchase system to aid in lifting heavier objects and decrease the load on the rope
Specifications:
- Max Rope: 8mm
- Breaking Load: 1250kg
![Harken 60mm Element Triple Block [6275]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/harken-60mm-element-triple-block-6275.webp)
![Wichard Snatch Block w/Snap Shackle - Max Rope Size 12mm (15/32") [34500W]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/wichard-snatch-block-w-snap-shackle-max-rope-size-12mm-15-32-34500w.webp)
![Wichard Soft Snatch Block - 12mm Rope Size [36020W]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/wichard-soft-snatch-block-12mm-rope-size-36020w.webp)
![Harken 29mm Carbo T2 Block [2146]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/harken-29mm-carbo-t2-block-2146.webp)
![Ronstan Series 40 All Purpose Block - Single Upright Lead [RF41171]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/ronstan-series-40-all-purpose-block-single-upright-lead-rf41171.webp)
![Ronstan Series 40 All Purpose Block - Single Cheek [RF41811]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/ronstan-series-40-all-purpose-block-single-cheek-rf41811.webp)
![Barton Marine Size 7 Single Plain Bearing Stand-Up Block [N07170]](https://www.sailrepairworks.com/wp-content/uploads/2026/10/barton-marine-size-7-single-plain-bearing-stand-up-block-n07170.webp)