The Gillette Labs 10 Pack of Refills is a 100% genuine item that includes 10 stainless steel blades compatible with the Gillette Labs razor with a heated blade for a closer shave. These refill cartridges are designed for use on the face, neck, chest, back, and body, making them suitable for teens, men, and unisex individuals. The black cartridges are a unit quantity of 10 and are made by the reputable brand Gillette in the United States. Ideal for achieving a smooth and hassle-free shave, these refill cartridges offer long-lasting use for your grooming needs.