Cap for standard mast

Top cap, to seal the top of a silver and school mast.
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Optiparts owns several moulds for producing custom end fittings.
All boom end fittings are made of high quality glass fibre filled nylon.
Unlike inboard boom-end fittings from other manufacturers ours have a firm
grip around the mast.This ensures that mast and boom turn together.
When retrofitting an old mast with a high heel plug first make sure the total
mast length will not exceed 2350 mm.
Diameters given are outside tube diameters.