It has two chromeplate copper barbs. The external diameter of the barb is 11mm. The height of the copper base is 3 mm. It has inner parallel water channel. The water contact area is large, thus to carry more heat from the GPU quickly.
This waterblock can be used on most of the AMD, NVIDIA series graphics.
Support list:
AMD series: 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 Nvidia series: 6800GT, 6600GT7800GT, 7800GTX, 7900GT, 7950GT, 7900GTO, 7900GTX, 8600GTS, 9600GT, 9500GT, 8800GT(G92), 8800GTS(G92), 9800GT, 9800GTX, 9800GTX+, GTS250, GTS450, GTX550, etc. GTX260, GTX260+, GTX275, GTX285, GTX570, GTX580, GTX660, GTX660TI, GTX670, and GTX680. It can support all the GPUs with 53-61 MM fan pitch-row.