Hard Tube Fittings 14mm G1/4in Thread Inner Hex Compression Fittings with Sealing Rings for Computer Water Cool SystemWhite Item Type: Hard Tube Fittings Material: The Main Body is High-quality First Class Brass, and the Color Outer Cover is Aluminum Alloy Model: BYGKN-C14 Specification: Thickness Approx. 9.3mm / 0.4in(Including Thread), Outer Diameter: Approx. 18mm / 0.7in Thread: Male G1/4in Accessories: White Silicone Sealing Ring (Installed), Black Sealing Ring (Spare) (White is Long Life Silicone Sealing Ring, Black is High Temperature Resistant Sealing Ring) Fixing Method: Inner Hex M8 Fixed Sealing Method: Built in 2 Sealing Rings, External 1 Sealing Ring Surfaces Treatment: Electroplating, Electrophoresis