Roscoe Medical, CPF-F31PK1, 1-3/4" x 7/8" CPAP Filter for SleepEasy System
For use with the Respironics with PR System One, Remstar Plus C-Flex, Remstar Auto A-Flex, BiPap Pro Bi-Flex, BiPap Auto Bi-Flex, Remstar Pro C-Flex, BiPap Pro Bi-Flex, SleepEasy with C-Flex and SleepEasy (Compare to Respironics #1035443 or #1063091).