ITEM NAME:Full Brass Outside Wire Water Meter Check Valve One Way Check Valve DN20 Description: Made of high quality brass, durable in use. The use of advanced casting mode, the product more solid and beautiful The check valve has a joint and can be used to prevent water from flowing back according to the direction of the product arrow. With high temperature silicone gasket, good sealing performance Capable of joining a variety of tubing materials such as stainless steel, copper, and rigid and semi-rigid plastics and polymers. Specification: Material: Brass Color: As picture shown Model_1: Copper 6 points inner wire to 4 points outer wire brass water meter check valve, 4 points = G1/2" (inch) = DN15 = 20mm (thread diameter); 6 points = G3 / 4" (inch) = DN20 = 25.5 mm (thread diameter) Model_2: Copper 1 inch inner wire to 6 points outer wire brass water meter check valve, 6 points = G3 / 4" (inch) = DN20 = 25.5mm (thread diameter); 1 inch = G1" (inch) = DN25 = 32mm ( Thread diameter) Package Includes: 1 Piece Live check valve Note: The color of the actual item may vary slightly from the above images. There is 2-3% difference according to manual measurement. Please check the measurement chart carefully before you buy the item..Made of high quality brass, durable in use. Material: Brass. The use of advanced casting mode, the product more solid and beautiful. 1 Piece Live check valve. With high temperature silicone gasket, good sealing performance.