、[General Size] The thread is G5/8 (BSP), suitable for most American beer keg couplers, 5/16 inch barb is suitable for beer tubes with inner diameter of 5/16 inch, it is larger than the general-purpose models on the market and can withstand higher traffic. 2、[Good Material] Made of high quality 304 stainless steel which has high temperature ductility, low magnetic permeability and low carbon content for greater corrosion resistance. 3、[Professional Design] The nut makes installation easier and faster, the elongated barb part allows the pipe to be installed deeper and provides clamps to make the pipe completely stable and not easy to fall off. 4、[Wide Application] Use for most American beer keg couplers, connect the line to the shanks and couplers. It can also be used for other scenes that need a G5/8 thread to a 5/16 inch barb fitting. 5、[Exquisite Workmanship] Excellent performance, it is very suitable for home brewing. This beer keg coupler adapter is suitable for professional and family brewers.