Environmental Material: The filter elements paper is made of environmental materials, and the whole is made of high-density fireproof fiber filter paper. It is non- and has no irritating odor. It filters impurities in oxygen to oxygen quality<br> Oxygen Concentrator Accessories: Our filter is the perfect filter accessory for the oxygen concentrator, which can effectively extend the service life of the oxygen concentrator<br> Easy To Carry: Small and light, more convenient to carry, suitable for workers who replace accessories outdoors<br> Wide Range Of Adaptation: Suitable for 90% of the oxygen generator equipment on the market, easy to use<br> How To Use: Open the back cover, remove the old filter, insert the new filter, and then close the back cover<br> Colour:As Shown<br> Material:plastic<br> Package Contents:<br> 2X Oxygen Generator Machine Replacement Filter<br> Only the above package content, other products are not included.<br> Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store