Kit includes: - 5 x 1mm chocks - 1 x 5mm chock - 2 x 10mm chocks - 1 x 20mm chock PACK OF 5 MAST DECK CHOCKS A.473 - - Adjustable mast chock kit for dinghies.This ingenious system allows you to adjust your mast chock with precision.Kit includes: - 5 x 1mm thickness - 1 x 5mm thickness - 2 x 10mm thickness - 1 x 20mm thicknessOverall width 90mmStern width 70mm Technical documents can be downloaded here