Features: 1.Universal computer CPU water cooling block with transparent acrylic cover. 2.It has two connectors. The external diameter of the connector is 12.9 mm. 3.The water contact area is large, thus it can carry more heat from the CPU quickly. 4.High performance copper base: 48 * 48 * 2.5mm. 5.The thread is international general G1/4. specification: Universal computer CPU water cooling block with transparent acrylic cover. It has two connectors. The external diameter of the connector is 12.9 mm. The water contact area is large, thus it can carry more heat from the CPU quickly. High performance copper base: 48 * 48 * 2.5mm. The thread is international general G1/4. s: Type: Water cooling Color: Shown as the pictures Material: Copper + Acrylic Inner Water Channel: No Thread Spec: G1/4" Actual Outer Diameter: 12.9mm Copper Base Size: Approx. 48 * 48 * 2.5mm / 1.9 * 1.9 * 0.1inch Bracket Thickness: Approx. 7.9mm / 0.3inch Hole Distance: Approx. 78*78mm, 72*72mm, 90*90mm, 93*93mm, 48*48mm, 51*51mm, 77*77mm, 72*72mm Package Weight: About 110g Package List: 1 x CPU Water Cooling Block 1 x Screw Pack