Our customers highly rate this SYF-B02 HTC quick-change concrete floor grinding disc in Europe, America, Australia, and other countries. We developed different great bonds to fit different hardness of concrete and terrazzo floors. Diamond grit from 16# to 220#, for coarse grinding and medium grinding. According to your requirements, we can offer you the packaging of 6 or 9 pieces per box. Each HTC grinding disc is well protected by pear wool inside and hard box outside. If you placed a mixed order, the label with an image on the box is helpful and can indicate the products inside. Optional Specifications Optional Diamond Grit 6#, 16#, 36#, 60#, 80#, 120#, 180#, 220# Optional Metal Bond extremely soft, very soft, soft, medium soft, hard, and very hard Optional Packaging 6 or 9 pieces per box Optional Painting Color High light or Matt, common colors are: orange, yellow, red, black, purple and blue Other services OEM/ODM service is available, such as logo engraving(free), painting color(free), and etc.