These ultra fine filters are designed for use with several of Puritan Bennett's 418 Series CPAP Machines. Ultra fine filters are disposable; for optimal performance they should be changed regularly when they appear soiled or discolored.
DIMENSIONS: Approximately 5.25 inches long by .75 inches wide.
COMPATIBILITY: GoodKnight 418 A CPAP Machine, GoodKnight 418 G CPAP Machine, GoodKnight 418 S CPAP Machine, GoodKnight 418 P CPAP Machine
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