Shim, 10 x 285 x 40 mm, for Mast Jack System D63/400 Cover This bow ring assembly makes

This bow ring assembly makes for a flexible installation as the ring can be positioned and fixed in a perfect direction for the outboard end of the bowsprit to end up on the prolonged centerline of the boat

408-001-21R rotates clockwise when tensioning the line

443-185-02

Ideal for sailors who occasionally want to optimize their boat for racing by use of overlapping jibs

Upper block: 406-601-06

Shim, 10 x 285 x 40 mm, for Mast Jack System D63/400 Cover This bow ring assembly makes10 mm thick aluminium mast jack shim. Pump up the mast, place shims below T base and mast heel and release pressure. Read all about Seldns mast jack systems on our website. https: support. seldenmast. com files 1723731359 597 107 E. pdf