This kind of filter is used for replaces filter Model DDT-1A/1B/1L/2A/1S
- Cleaning air is necessary for your breathing treatment, the new filter will filtered air well.
- Constantly replace the filter will contribute to your breathing treatment machine working well.
- High quality/Low cost replacement filter
- Buy in bulk to save, delivered within about 15-20 days.
Welcome to click here to buy DDT Series Oxygen Concentrator.