The Sensitive Kit is the perfect blend for those new to the Personal Microderm or individuals with sensitive skin. Each box includes 1 small and 1 large White disc (ultra sensitive), 1 small and 1 large Grey disc (very sensitive) and 1 small and 1 large Blue disc (sensitive). The PMD Personal Microderm uses a patented spinning disc technology to deliver revolutionary microdermabrasion treatments and unmatched, brilliant results. The patented disc spins as it glides across the skin and provides a beautiful treatment without having to manually scrub the PMD against the skin, which many other microdermabrasion devices require. Aluminum oxide is a naturally occurring element that is extremely hard, second only to diamond. These crystals are completely hypoallergenic and prevent the possibility of any allergic or adverse reaction. The aluminum oxide embedded discs provide the most effective results available, and they completely eliminate the possibility of spreading bacteria that may cause breakouts or irritations, which is a risk when diamond tips are used. Imported.