Maintain a constant supply of Gillette Fusion Manual Refill Cartridges. Gillette Fusion is a fantastic approach to shave for every man, whether they have facial hair or are clean-shaven. On the front of the shaving cartridge for the Gillette Fusion, there are five Shaving Surface blades. Compared to the Mach3 razor series, the blades are 30% closer together. In order to greatly lessen irritation and increase comfort, this produces a shaving surface that evenly distributes the shaving force throughout the blades. includes a Lubrastrip that changes color from green to white to indicate improved shave conditions.