The F-one alu foilmast is suitable for all the foils from the F-one foil collection.
When you don't have an F-one foil yet and your buying this mast in combination with an F-one Plane you'll need a Titan Mastfoot + the mast top plate.
When you're just looking for an extra mast length, don't worry about the Mastfoot or the Mast top plate.
Mast top plate. Titan Masfoot.