The Gillette Labs Razor Refills are a pack of 8 XL cartridges that are 100% genuine and sealed. These refill cartridges are specifically designed for use with Gillette Labs razors, featuring stainless steel blades that are ideal for shaving the face. With 5 blades per cartridge and a total of 8 cartridges included in the pack, this product is suitable for both men and teens looking to achieve a smooth and clean shave. Made in the United States, these black cartridges are compatible with the Gillette Labs razors equipped with the exfoliating bar and heated razor features.