Plastic. Includes washer and nut. No brass friction rings needed. Our faucets and Bathroom accessories provide a great experience with their high quality and high performance. The design team is well integrated in its approach and helps to produce latest products every day. Our stateofthe art manufacturing units are backed by a world class testing lab. Thats why our faucets conform to the highest quality and regulatory standards.Features. Nut Washer Slipjoint. Slip Point. WhiteSpecifications. Color White. Size 12 in. . Washer ODxID In 13/4 x 11/2. Weight 0.1 lbs