Description
25mm Halyard Block
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.
Specifications:
- Fixing Holes: 5mm Dia.
- Max Rope: 8mm
- Breaking Load: 500kg



![BoatLIFE Life-Calk Sealant Tube – Non-Shrinking – 2.8 FL. Oz – Mahogany [1032]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/boatlife-life-calk-sealant-tube-non-shrinking-2-8-fl-oz-mahogany-1032.webp)

![Ram Mount Universal D Size Ball Mount with Long Arm for 9″-12″ Fishfinders and Chartplotters [RAM-D-115-E]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/ram-mount-universal-d-size-ball-mount-with-long-arm-9-12-fishfinders-chartplotte.webp)

![Attwood LightArmor Deck Mount Navigation Light – Stainless Steel – Starboard (green) – 2NM [NV2012SSG-7]](https://www.bestmarinewiring.com/wp-content/uploads/2026/08/attwood-lightarmor-deck-mount-navigation-light-stainless-steel-starboard-green-2.webp)

