The chart above indicated that the maintenance fees of such PVD coated sliding door slots are much lower than the brass ones'. And in the third year, the total cost of the PVD coated products occupies only 55.6% of the brass (uncoated), similarly, 61.55% of the brass(lacquered). As a result, the PVD coating technology not only enhance the appearance of the products, but also save you a lot of money, time and effort for cleaning. That's the obvious advantages of our PVD coating technology.