Gillette Mach 3 razor refill cartridges. Gillette Mach 3 cartridge has 3 Blades with Diamond like coating that stay sharp longer to give you a great shave even on Day 30. Gillette’s 3 Blade Shaving Surface Technology with Anti-Friction razor blades gently glides across your face with incredible shaving ease and outstanding facial hair removal. With a shave this smooth, comfort is a slam-dunk. Available in packs of 2s, 4s, 8s and 12s.