Size: 3/8 inch thread x 1/2 inch male thread suitable for all barrels/containers with wall thickness up to 14 mm. Male thread brass connector, thread inside. Built-in gasket provides strong sealing without slipping. Using the connection by to establish a more firmly connection. Not easy to leak with 2 silicone rings, double-sided protection It can be used in , , inlet and outlet and homemade , which can be used for various pipes, faucets, hoses, fittings, etc. Heavy duty brass construction with anti-rust, easy to connect. More reliable than aluminum or plastic materials. Material: Brass Color: Bronze Package Contents: 18 x Bulkhead Tank Fittings Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.