1. Easy Installation: The replacement filter is part of the breathing machine, which is simple to install and requires no special tools. 2. Portable Size: The oxygen concentrator filter is small and lightweight, making it easy to carry in your bag for convenient use. 3. Smooth Edges: The oxygen concentrator filter is made with fine craftsmanship, with excellent details and rounded edges, which will not scratch your hands. 4. Excellent ABS: The oxygen concentrator filter box is made of ABS material, sturdy and durable, which is not easy to damage. 5. Regular Replacement: The breathing machine filter should be replaced regularly to keep the machine in good condition. Item Type: Oxygen Concentrator Filter Color: As shown Material: Plastic Package Contents: 1 * Replacement Filter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3 cm.