1、Computer GPU water cooling block with POM cover. 2、The water contact area is large, thus it can carry more heat from the GPU quickly. 3、It has two connectors. The external diameter of the connector is 19 mm. 4、The thread is international general G1/ 5、It has no inner water channels. Features: Computer GPU water cooling block with POM cover. The water contact area is large, thus it can carry more heat from the GPU quickly. It has two connectors. The external diameter of the connector is 12.9 mm. The thread is international general G1/ 4. It has no inner water channels. Specifications: Type: Water cooling Color: Shown as the pictures Material: Red Copper + POM Thread Spec: G1/4" Water Channel: No Actual Outer Diameter: 12.9mm Copper Board Size: Approx. 40 * 40 * 2.3mm / 1.6 * 1.6 * 0.09inch POM Cover Thickness: Approx. 16mm Hole Pitch: Approx. 52*52mm, 43*43mm Package Weight: About 91g Package List: 1 x GPU Water Cooling Block 1 x Screw PackNote:Do not ship with silicone grease