Welcome to our store! 1. Block Particles: The filter kit effectively blocks fine and large particles, protecting the machine, providing clean air, and ensuring the health of elders. 2. Perfect Fit: Suitable for Philips Respironics DreamStation 2 breathing machine, a wonderful replacement for the old or broken one, easy to install. 3. Regular Cleaning: The reusable filter can be cleaned every two weeks to maintain a clean and hygienic breathing machine, extending the machine's lifespan. 4. Usage Time: The sheet filter is for single use, one or two pieces per month; the box filter is one piece for every three months, and it is used repeatedly after cleaning. 5. Multiple Applicable Places: Lightweight and small in size, easy to store and carry, can be easily put into your bag, suitable for home, hospital, care center, etc. Article Type: Breathing Machine Filter Set Material: ABS Usage Time: 6 months Scope of Application: For Philips Respironics DreamStation 2 breathing machine 2 x Box Filters 6 x Sheet Filters