Features: Suitable for connection between water blocks,radiators, water pumps, reservoir and other water cooling system kit. Compact and flexible, easy to screw on andoff. A chamfering angle in the inner side forreducing resistance. With hidden silicone ring, perfect forconnection and seal. Chromium plating on the surface, light anddelicate. Specifications: Material: Stainless Steel + PlasticColor: Silver Surface Treatment: Chromium Plating Applicable Tube: 5.5mm Diameter: for 5-5.5mm inner diameter hose 7.5mm Diameter: for 5-6.5mm inner diameter hose 9.2mm Diameter: for7-8mm inner diameter hose 11mm Diameter: for 9.5-10mm inner diameter hose Package Weight: 60g Package List: 6 * Barb Fittings Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering..