Computer System Cooling Parts features: GPU Water Cooling Block PC Copper High Performance Liquid Cooler AMD NVIDIA W40 Color: we send based on the color or size of the main image of the product page. Quantity：we send based on quantity on title, if there is no quantity in the title, we send based on description. Description :GPU Water Cooling Block PC Copper High Performance Liquid Cooler AMD NVIDIA W40 Features : 2 holes on the side of the cover, the water flows from the side. 0.4 mm copper columns on the copper base. The water link area becomes large, so the block can carry more heat from GPU quickly. The base is made of T2 (purity of 99.9%) CNC cut copper. The surface flatness is less than 0.01 mm. The base can fit the GPU better, so that it can absorb more heat. The copper base is processed with anti-oxidization technology. Specification : Copper base dimension(mm): 50 x 50 x 3 Fitting thread: G1/4" Supported tube: 9.5 mm(ID) x 12.7 mm(OD) PU tube, or 10 mm(ID) x 16 mm(OD) solid tube, or 8 mm(ID) x 12 mm(OD) silicon tube Material: Base: Copper Cover: Clear acrylic Fitting: Brass, Nickel plated Package includeds : 1 x Water Cooling Block 2 x Compression fitting 4 x Mounting screw