It facilitates the connection between a gas canister and another gas canister in order to direct the gas from the canister to the other gas canister. Easy to carry on the go Material: the main parts of this product are matte aluminum alloy, durable and suitable for switching refilling methods. Special design, fine workmanship, worth having Suitable for most barbecue grills, camping stoves, burners. Stable performance, high reliability, easy and convenient installation.