Most of the Kioti tractors don't use the inner filter. The Bobcats, which are primarily the same tractor, have the inner filter. Someone had posted that John Deere uses the inner and outer that would fit the Kiotis. So my CK30hst could use the filters of the CT230. Some Kioti members here have purchased the extra filter for their Kiotis.
Just wondering on what tractor you have? And what was the cross reference for the filter? I have a CK30 and need a new one and we don't have a dealer close. But there is a NAPA.