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Because all OUBAO faucets are made of 100% brass, Burnished Brass and Spain Brass provide a new way for the beauty, quality and luxury of this exquisite metal. Burnished Brass's design will shine over time, blending high quality brass with today's growing demand for industrial fashion designs and a rich retro look. Satin brass (PVD) is slightly shiny. Like classical brass, it is treated with PVD - the most durable surface treatment in the world. The hardness of PVD coating is 8 times higher than that of chromium plating. It has lifelong warranty and can prevent losing luster.