Computer GPU Water Cooler Cooling Block Copper Base POM Cover with Waterway 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.  The copper base is processed with anti-oxidization technology. Specifications: Type: Water cooling Color: Shown as the pictures Material: Copper, POM Thread Spec: G1/4" Actual Outer Diameter: 12.9mm Copper Base Size: Approx. 50 x 50 x 3mm / 2.0 x 2.0 x 0.1inch Bracket thickness: Approx. 2mm POM cover thickness: Approx. 18mm Hole Distance: Approx. 61mm, 53mm, 50mm Package Weight: About 143g Package List: 1 x GPU Water Cooling Block 1 x Screw Pack 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.