I used this filter to replace the NOS Case/IH branded unit that I used last. This is for a Deluxe brand canister filter requiring a "CU" cartridge filter. This NAPA replacement is not as tall as the genuine unit. Less filter size equals less filtering capacity. In addition, I had to reuse my old rubber ring because of the 2 that were included, one was too small and the other was too big. Needless to say, I'll be looking for NOS filters or genuine Case/IH from now on.