Stainless steel female quick coupler plug w/ pullring - useful for preventing dust and unwanted moisture from entering the fitting that will be playing a crucial role in refilling your PCP rifle or otherwise provide pressure for your staple gun, etc.
This part plugs in securely and its stainless steel composition guarantees better handling resistance than the brass alternatives on the market.
PCP handpump or HPA compressor can only filter out what passes through your hose from one direction - ingress protection from the other end, use this plug and ensure that dust and other residue does not enter your reservoir, which might gradually cause clog-ups with time or even gradually unseat your O-rings.
Good quality CNC milled w/ an attractive smooth and slightly refractive finish - The pullring is ferrous metal w/ sufficient open diameter to allow your index' frontal digit through, ⌀22.55mm. Manufactured strong as well and will hold up to years of use.