Stainless Steel Single Block - 25mm Sheave Diameter for 25mm Stanchion Pivoting A single block intended for use on a dinghy. The block is light, reliable, and has good performance.; Applications: For stanchion applications - furling system line; Specifications: Materials Composite sheave and 316L stainless steel grade cheeks; Rope size: (inch) 5/16"-25/64" / (mm) 8-10; Length: (inch) 3 47/64" / (mm) 95; Width: (inch) 2 3/32" / (mm) 53; Thickness: (inch) 53/64" / (mm) 21; Sheave Diameter: (inch) 63/64" / (mm) 25; Working load: (lb) 610 / (mm) 280; Breaking load: (lb) 880 / (mm) 400; Weight: (lb) 0.154 / (g) 70; Caption: Working Load (WL): For nautical applications; Working Load Limit (WLL): For industrial applications only. The safety factor is 5 times the breaking load. WLL = Breaking load / 5; *Sold as an Individual - cis2:mm5mnJlm -Quick Guide (pdf)