Male and Female : For QCC1/ hose and regulators. When the 20 lb propane runs out, you can connect the 1 lb propane tank. The Disposable Propane Bottle Adapter connects a 1 lb propane tank to the / propane hose to continue supplying gas to your gas grill and other appliances. SAFE CONNECTION: With on/off control valve to avoid any possible leakage. When feeding the grill with the 1lb tank, closing the valve allows the gas to burn off in the feed tube to avoid any surprises when changing the tank. You can also cut off the propane supply at any time. And you 't have to worry about whether to connect the propane hose or the 1 lb propane tank first.Colour:yellowMaterial:brassPackage Contents:1 x Propane Tank AdapterOnly the above package content, other are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.