1、MAIN PURPOSE: Gas tank adapter, mainly used to adjust old POL tank valve to fit QCC1 1 Type hose and regulator, with secure and tight connection. 2、BRASS MATERIAL: Made of excellent brass material, corrosion resistant, has good high temperature ductility and low magnetic permeability. 3、WIDE APPLICATION: Provides a safe and airtight connection, very suitable for barbecue grills, camping stove, propane heaters and other equipments. 4、EASY TO ADJUST: This propane tank adapter has a black handle, with simple valve control, easy to adjust and tighten, convenient and practical. 5、COMPACT SIZE: The propane tank coupler has compact structure and standard size, easy to install without taking up space, has good compatibility.