Harken 40mm Twing Block is used for spinnaker sheet, spinnaker brace and code zero sheet up-down control.

The Twing Block features:

• opening sideplate making it easy to rig and remove sheets
• spring biased to open when unlatched for one-handed operation
• ¬†roller at pivot base for 1:1 or 2:1 up-down control
• Carbo Air¬Æ block construction - high strength for durability and light weight for maximum float in light air.

Specifications:

• Max sheet diameter:¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† 12mm
• Max up-down line diameter:¬† ¬†10mm
• Max working load:¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬†275kg
• Breaking load:¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† ¬† 825kg