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 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. Specifications: Color: Shown as the pictures 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 Weight: About 137g Package Included: 1 x GPU Water Cooling Block 4 x Screws (Not including other things.)