Product review (1 stars): Kitchenaid 4318938 NOT SAME as Whirlpool W10165296RP
If you are looking for a large compactor bag to fit an 18" compactor such as the Electrolux IKON, the Whirlpool W10165296RP IS NOT a substitute for the Kitchenaid 18" 4318938 bag.  Evidently the Kitchenaid product is no longer available and the Whirlpool bag is substituted (by all vendors I believe).  The Whirlpool 18" bag is smaller than the Kitchenaid and is NOT an adequate substitute as it does not fit compactors such as the Electrolux (whereas the Kitchenaid bag did).  So, bear that in mind if you are actually trying to buy the Kitchenaid bag.