PMD Orange Coarse Replacement Discs are designed for those who use the Personal Microderm (sold separately) weekly and want a higher level of exfoliation. The discs are embedded with aluminum oxide, a naturally occurring element that is second only to diamonds in its hardness. These crystals are completely hypoallergenic and prevent the possibility of any allergic or adverse reaction, eliminating the spread of bacteria that may cause breakouts or irritations. Style Name: Pmd Orange Coarse Replacement Discs. Style Number: 5061722. Available in stores.