Size: 3/8 inch female thread x 1/2 inch male thread suitable for all barrels / containers with a wall thickness of up to 14 mm Male thread brass quick connector,female thread inside.Embeded gasket provides strong seal without slipping. Using thread linking to make connection more firmly. Not easy to leak with 2 Silicone Ring, double sided protection It can be used in water towers, water inlet and outlet, and self-made water storage barrels, which can be used for pipes, faucets, hoses, fittings, etc. Heavy-duty brass construction with rust proof, Easy to connect. More reliable than aluminum or plastic materials. Material: brass colour: Bronze Package Contents: 3 x bulkhead tank fitting Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.