The all-new Pacific W4 RGB CPU Water Block features a RGB LED, 0.15mm internal fin construction, a copper base with anti-corrosive nickel plating and high-quality PMMA cover, and a universal mounting mechanism that offers error-free as well as no-tools installation. Fits with most G1/4 fittings, the Pacific W4 RGB provides the ultimate in cooling performance, and delivers extreme compatibility for custom PC builders.