Braun listings generally recommend replacing the replacement shaver head every 18 months to maintain optimal shaving performance and comfort.
These replacement heads are foil-type shaver heads designed for use with Braun foil electric razors.
Warranty coverage varies by listing: some product bullets state "No Applicable Warranty," while at least one listing mentions an "up to a 5 year warranty." Always check the specific product details and the manufacturer's website for the exact warranty terms and conditions for the item you plan to buy.