Watercooling - Angle Manual Srew Connector - Fitting 1/4" - For 8/10 Tube Angle Metal Screw Manual Connectors Brass + Nickel Fitting : 1/4" For Tube : Diameter 8/10 (8mm internal, 10mm external) 1/4" 08/10mm universal use products, but its dimensions make it the perfect connector to use for Cape Cora Passive Watercooling Heatsink Mounting.