Harken
16 mm Narrow Block Sheave dia. (in): 5/8 Sheave dia. (mm): 16 Weight each (oz): .44 Weight each (g): 12 Max. wire dia. (in): 3/32 Max. wire dia. (mm): 2 Max. line dia. (in): 5/32 Max. line dia. (mm): 4 Max. working load (lb): 250 Ma