BAUER 058821 filter cartridge is a complete cartridge with dessicant, activated carbon, and catalyst for CO control. Cartridge body is 9 1/4" long, excluding the nipple. This cartridge is most often used alone in a single tower design (P1) or at the end of  a multiple chamber arrangement (P4). GENUINE BAUER.

If you are not sure which cartridge you need, please contact us! We can help.