Most replacement foil head listings include both the foil (screen) and the cutters/dual blades — descriptions often say things like “Includes Foil and Cutters” or “Contains one screen and two cutters.”

Recommendations vary by listing: many advise replacing foil heads and cutters every 6 months, while others give a broader 6–12 month window depending on usage.

Yes — several item details include a “Trial/Mini/Travel Size: Yes” note, indicating that some replacement heads are sold or listed as travel- or trial-size units.

At least some listings explicitly describe installation as “Easy Installation” or “quick and hassle‑free,” indicating replacement is intended to be simple; check the product description for any installation notes or included instructions.