1、Suitable for connection between water blocks, radiators, water pumps, reservoir and other water cooling system kit. 2、Compact and flexible, easy to screw on and off. 3、A chamfering angle in the inner side for reducing resistance. 4、With hidden silicone ring, perfect for connection and seal. 5、Chromium plating on the surface, light and delicate. Features: Suitable for connection between water blocks, radiators, water pumps, reservoir and other water cooling system kit. Compact and flexible, easy to screw on and off. A chamfering angle in the inner side for reducing resistance. With hidden silicone ring, perfect for connection and seal. Chromium plating on the surface, light and delicate. Specifications: Material: Stainless Steel + Plastic Color: 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.