CO2 regulator brass with chrome plating a complete range of specifications apply to beer machine, beverage processing CO2 regulator Inland standardDiameter size: 50mm(or customized ... polycarbonate3 internal and connector: brass4 bottom thread: GOST, BSP 1/2, 1/4, 1/8, 5/8, and others,also can ... rubber washers to reduce the shakeso as to protect the CO2 regulator when using it. CO2 Regulator FD-F11