Water Cooling Fittings G1/4 External Thread for 9.5X12.7mm Soft Tube Computer Water Cooling. Features: compact design, double pagoda for safety, and two seal lines for reduced resistance. Specifications: Color: Black, Silver; Material: Brass; Surface treatment: nickel plating; Screw Thread: G1/4; Outside diameter: approx. 12.9mm/0.5''. Application of inner diameter 9.5mm/ 0.35'' and outer diameter 12.7mm/0.5''. Weight: approx. 20g.