T-H Marine Brite Plate Chrome Plastic Thru-Hull Fittings T-H Marine Brite Plate Chrome Plated Fittings offer the look of stainless for the price of plastic. The Brite Plate plating process actually strengthens plastic parts and will resist sunlight, salt water, oil, gasoline and most common marine chemicals. Thermal cycling and CSA wet cycle testing confirm the strength of the plating layer. All parts are subject to regular testing of salt spray and strength requirements. Features Look of stainl