8MM quick disconnect adapter double male fill nipple. Replacement to your existing fill for valves/regulator. Atmospherical bottle to small cylinder inflation or connect to air tanks when used with two fill adaptors. Simply connect each fill adaptor to the female painbtball tool fittings. Suitable for Inflatable cylinder fittings, for PCPair-soft, airgun, Foster, tanks and SCBA tanks filling etc., Manufacturer: Ranuw