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6:1 Downhaul System - Harken 18mm Blocks

6:1 Downhaul System, using Harken 18mm Carbo blocks.  These 18mm blocks are only suitable for the Radial/Standard MkI and 4.7 rigs.  For the MkII rig use the larger 29/30mm blocks and ideally an 8:1 system.  The downhaul is available with a choice of secondary lines, Robline Dinghy Control secondary line or our premium Marlow GP78 line.   

Dinghy Control is a general purpose Polyester cover with a Dyneema® SK78 core. 

Marlow Excel Racing GP78 has a blended Technora®/Polyester cover for excellent durability and grip, and a Dyneema® SK78 core providing greater longevity especially for the highly loaded downhaul where the cleat causes wear, and excellent grip in the hands.

Primary line is 4mm SK78 Dyneema.

Choose the secondary line type, colour and length that you want.  

Main photo shows Harken 18mm system with blue primary and Marlow GP78 Blue/Black secondary.