All fittings on this radio controlled model sailboat are solid brass or high grade marine 316 stainless steel. The hull is 1/8 inch mahogany plywood. The sails are genuine nylon spinnaker cloth. This is the same material as is used on full size sailboat spinnakers. All of the full power radio control gear is included in every kit. Everything for building and sailing your boat is included in the kit, except for paint, varnish and AA batteries.