Keep your Remington rotary shaver at peak performance with these replacement blades. This product features a universal design that makes changing your blades easy. The replacement cartridge consists of one piece that easily snaps onto the top of your shaver and is compatible with the following models: R3130, R3150, R4100, R4130, R4150, R5130, R5150, R6130, R7130, and R8150.