25mm Double Block with ShackleThe 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 00.21 can be used to create a 4:1 purchase system to aid in lifting heavier objects and decrease the load on the rope Specifications: Max Rope: 8mm Breaking Load: 1000kg