Features: Material:Made of high-quality copper alloy, rubber, hard resin, and aluminum alloy. Application: (1)The CB can adapter is suitable for filling CB can with each other (2)The OD can adapter is suitable for filling OD can can connecting hoses. (3)The combination of CB can and OD can are suitable for CB can connecting hoses. (4)This is a converter tool that can be used outdoors or camping, outdoors, emergencies, and outdoor gas equipment (burners, stoves, lanterns, etc.), and can be used in regular cassette cylinders .