![SeaSure 25mm Treble Block w/Shackle [00.31CRD]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/seasure-25mm-treble-block-w-shackle-00-31crd.webp)
Description
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 29mm Carbo Air Block w/Swivel [340]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-29mm-carbo-air-block-w-swivel-340.webp)
![Harken 40mm Carbo Air Block w/Swivel [2636]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-40mm-carbo-air-block-w-swivel-2636.webp)
![Harken 45mm Double Element Block w/SwivelBecket [6239]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-45mm-double-element-block-w-swivelbecket-6239.webp)
![Harken 57mm Carbo Air Fiddle Block w/SwivelBecket [2622]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-57mm-carbo-air-fiddle-block-w-swivelbecket-2622.webp)
![Harken 16mm Double Block [406]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-16mm-double-block-406.webp)
![Harken 22mm Micro Block [224]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-22mm-micro-block-224.webp)
![Schaefer Single Aluminum Block – 51mm Sheave [504-05]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/schaefer-single-aluminum-block-51mm-sheave-504-05.webp)
![Harken 22mm Fiddle Micro Block w/V-Jam [244]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/harken-22mm-fiddle-micro-block-w-v-jam-244.webp)