2 holes on the side of the cover allow water to flow from the side. 0.4 mm copper columns on the copper base increase the water contact area, enabling the block to transfer heat from the GPU more efficiently. The base is made of T2 copper (99.9% purity), CNC machined and treated with anti-oxidation technology. Surface flatness is less than 0.01 mm, ensuring better contact with the GPU for improved heat absorption. Compatible with GPUs having fan hole distances between 53 mm and 61 mm. Supports NVIDIA models: 6800GT, 6600GT, 7800GT, 7800GTX, 7900GT, 7950GT, 7900GTO, 7900GTX, 8600GTS, 9600GT, 9500GT, 8800GT (G92), 8800GTS (G92), 9800GT, 9800GTX, 9800GTX+, GTS250, GTS450, GTX550, GTX260, GTX260+, GTX275, GTX285, GTX570, GTX580, GTX660, GTX660TI, GTX670, GTX680, GTX560, GTX460, GTX460TI, GTX560TI. Supports AMD models: X1900PRO, X1900XT, X1900XTX, X1950PRO, X1950GT, X1950XT, X1950XTX, 2600XT, 2900XT, HD3850, HD3870, HD4750, HD4770, HD4850, HD4870, HD4890, HD5830, HD5850, HD5870, HD6970, HD6950, HD6870, HD6850, HD6790, HD7870, HD7850, HD7950, HD7970. Application: Processor Model Number: Water cooling block Size: Copper base dimensions (mm): 50 x 50 x 3 mm, Fitting thread: G1/4 inch Color: Transparent Material: Metal Package Contents: 1 x Water cooling block 2 x Compression fittings 4 x Mounting screws Only the items listed are included; other accessories are not included. Note: Lighting and display settings may cause slight variations in color between the product image and the actual item. Measurement may vary by +/- 1-3 cm.