Braun recommends changing your shaver’s foil & cutter block every 18 months to maintain your shaver’s maximum performance.
Compatible with new generation Series 3. (3070cc, 3050cc, 3045, 3040, 3030, 3020, 3010 and 3000) 
Compatible with old generation Series 3. (350, 350cc, 340, 320, 310, 300)  
Compatible with cruZer shave. (cruzer 6 clean shave, cruZer 5 clean shave)