The top cap is the marine boat fitting designed for sailboat and powerboat bimini tops. Together with top slide or deck hinge, it can accept tubes in different diameters. Like all the cast marine boat fittings, the top cap is also made in 316 cast stainless steel. Stainless Steel Investment Casting Process When it comes to making complex marine boat fittings with fine details, manufacturers often go for stainless steel casting for several good reasons. Compared to machining or other…