Features: 1.TYPE: This is a male to male expansion joint, the connection length is 5mm/0.2in, and the thread is G1/4in. UsIing a sealed O circle and can be tightened by hand 2.EASY to USE: The G1/4 Fitting a quick connector mainly used for air pipes and pneumatic tools. Connecting or disconnecting pipes without tools 3.SCOPE of APPLICATION: Suitable for PC water cooling applications to meet your daily computer needs 4.DURABLE COPPER: The G1/4 Fitting is made of copper material, which is strong and durable and has a long service life 5.PURPOSE: Using G1/4in internal thread to connect 2 water cooled components together, which is very suitable for putting some three way fittings and drain valves specification:Item Type: Water Cooling Fittings Product Material: Brass Product s: Length 15mm/0.6in (including thread), Outer Diameter 17.8mm/0.7in Product Thread: Male G1/4in Product Accessories: White Silicone Sealing Circle (installed) , Nitrile Sealing Circle Black (spare) (white is long life silicone sealing circle, black is high temperature resistant sealing circle) Product Fixing Method: Inner Hex M8 Fixed Product Appearance Treatment: Electroplating, Electrophoresis PackageList:1 x Water Cooling Fittings 2 x Sealing Rubber Circle