These filters are designed for use with all SleepStyle 230, 240, 250 and 600 Series CPAP systems from Fisher & Paykel.
DIMENSIONS: Approximately 3 inches long by 1 inch wide.
COMPATIBILITY: All SleepStyle 230 Series CPAP Machines (HC233, HC234, etc.), All SleepStyle 240 Series CPAP Machines (HC243, HC244, etc.), All SleepStyle 250 Series Auto-CPAP Machines (HC254, etc.), SleepStyle 600 Series CPAP Machines (HC604, HC608, etc.)
USAGE: SleepStyle filters are disposable; for optimal performance they should be changed regularly when they appear soiled or discolored.