Type: Meet G1/4" standard, Male to Male Extender Fitting ^^
Material: Brass- Hidden thicker O-ring design ^^
Body size: 18mm*15mm ^^
Design: Concealed O-ring design for leak-proof and sealing, mainly used for quick couplings of air pipes and pneumatic tools, you can connect and disconnect pipes without tools.
^^ Application: suitable for PC water cooling system fittings