Series 3 Shaver Cassette Foil & Cutter.
Shaver head should be replaced every eighteen months.
Replacing your razor head gives a 25% better shave. 
For optimum performance clean regularly.
 
Applicable models: Series 3: 4-390cc, 390cc-5, 360s-4, 5-360s, 320S-4, 330S-4, 5-320S, 330S-5, 390cc, 395cc-3, 370, 350cc, 370cc, 330, 320, 370cc-4, 350cc-4, 350cc-5, 340s-4, 4-345s, 340s-5, 5-345s, 380s-4, 380, 340, 360....