Maestrini threaded skin fitting made from dezincification resistant brass (DZR), also known as CR brass which stands for corrosion resistant. This material is a brass alloy which prevents corrosion, caused by the loss of zinc in the fitting, making it suitable for exposure to sea water. A skin fitting connects to a threaded pipe and is designed for through hull applications. This skin fitting features an inclined head style to create less drag and is supplied with a brass fixing nut and washer. Please Note: All fittings used for through hull applications must be correctly electrically bonded to ensure protection from electrolytic corrosion. DZR is suitable for below waterline through hull applications.