Description G1/4 GPU Water Cooler Block Universal for GPU Computer Water Cooling System Waterblock for AMD for Intel 775 1156 LGA 2011 Features: This is a universal Water Cooling Block for GPU. Red copper at the bottom, top cover is transparent Acrylic, and the buckle holder is made of stainless steel. Copper base is precisely cut, the for gap between each cut copper is about 0.5mm laterally and vertically. 25 water channels. High performance copper base, processed with anti-oxidization technology. Perfectly fit the GPU, carry away more heat from GPU quickly. Can be used on for AMD 940, AM2, AM3,AM4,Bulldozer, for Intel 775, 1155, 1156, 1366,for Intel LGA 1150 and LGA2011 platform Specifications: Material: Red Copper + Acrylic + Stainless Steel Base Size: Approx. 40 * 40 * 3 mm / 15.7 * 15.7 * 1.2 inch Thread Spec: G1/4 Outer Diameter: 12.9mm Compatible GPU: Fan Hole Size is 43*43mm, 48*48mm, or 53*53mm. Package Included: 1 x GPU Water Cooling Block 1 Pack x Screws