The K30SP Cleancut Shaver Replacement Parts Package includes a new Blade Assembly, Slotted Foil Head (screen) and Protective Cap (three piece set.) All the parts you need to renew your ES412 Cleancut. Easy to install. Just screw the foil off your ES412 Cleancut Shaver and lift the old Blade Assembly off the shaft. Place the new Blade Assembly on the shaft and screw the new Foil Head on. Presto..you're done! Your ES412 Cleancut is as good as new. Package also includes a new protective Clear Plastic Cover that goes over the Foil Head to prevent damage to the foil between uses. Note: Depending upon use, the Blade Assembly and Foil Head should last anywhere from 6 months to two years depending on use. NOTE: For use with the Model ES412 Cleancut Shaver only...will not fit the Model ES1080 Cleancut Shaver.