NIKKEIKIN best results with the shape of Fin and frequency of Fin dust are stuck in front of Fin's easy to clean, SCAN will not differ from NIKKEIKIN much, but the frequency of Fin less than the dust. caught in Fin windows over the NIKKEIKIN and easy to clean because the same pattern as Fin
KOHSAN. There are more than dust because of the shape of the window and Fin has a dust collection than cleaning more difficult.