PVD is a highly accurate plating process carried out in high vacuum environments at temperatures between 150 and 500 *C. It produces an extremely (emphasize EXTREMELY) durable finish to prevent scratching. Typically, black hardware that is found in the marketplace is not PVD, and is generally considered a black spray paint causing it to chip and scratch off within days. PVD plating is the process used to plate high end watch hardware, golf clubs, etc., and the only successful way to make a black that will not wear off. The PVD process is more intensive and is thus reflected in the price per piece. Please click here to learn more about PVD plating.
Sizes: Size refers to inside dimension of base loop