The plug fitting is widely used for the computer CPU. When the plug is screwed in , the liquid can be stored in the water cooling system for a long time. Thread Dia: G1/4 inch; Color: Black; Material: Brass; Surface treatment: Chrome Plating; Seal: With silicone sealing ring; In the package: 6 x Plug Fittings. The plug adapter is electroplating processing, bright luster, exquisite appearance. Front end slot and roll lace design. Easy to install and use. It can be tightened with a coin, can also be hand screwed. All size above is measured by manual, please allow +/-0.1 inch error.