· [Compatibility] Compatible with all Braun Clean&Renew System (Activator, Synchro, Pulsonic and Series). These are Clark Shaving Co. branded cartridge.· [Cartridge] Length is about 4.5 inch. Width is about 3.75 inch. Height is about 1.75 inch.· [Protect Your Shaver] Lemon Fresh Formula: alcohol-based solution that cleans and lubricates the shaver· [Premium Quality] MADE IN USA.· [Frequency Of Replacement] Replace the refill cartridge every 2 months to experience a shaver like new, every day.