Harken 40mm Twing Block

40mm Twing BlockLow-friction Carbo Air blocks are lightweight, strong, reliable-and affordable. Companions to our popular Harken Big Boat blocks, these small, compact blocks have very high working loads for safe, easy trimming.Features:Opening side plate - Easy to rig and remove from sheetSpring biased to open when unlatched - One-handed operationRoller at pivot base - Use 1:1 or 2:1 up-down controlCarbo Air® block construction - High strength for durability and lightweight for maximum float in light airUses:Dinghies, sport boats, and small keelboatsSpinnaker sheet and guy controlCode zero sheet up-down controlSpecifications:Sheave Ø (mm): 40 mmSheave Ø (in): 1-9/16 inLength (mm): 89 mmLength (in): 3-1/2 inWeight (g): 86 gWeight (oz): 3 ozMaximum line Ø (mm): 12 mmMaximum line Ø (in): 3/8 inMaximum working load (kg): 275 kgMaximum working load (lb): 606 lbBreaking load (kg): 825 kgBreaking load (lb): 1818 lb