Layer by layer cleaning filtration, can filter fine particles, convenient for use.<br> An essential accessory for the oxygen generator, which effectively extends the life of the machine.<br> Lightweight and small, easy to carry and install on the machine.<br> Adopts international standard filter paper, high density, no pungent smell.<br> Made of high quality ABS material, safe and environmentally friendly, stable and durable.<br> Specification: Condition:<br> Elements type: filter.<br> Filter Screen Type: Composite Filter Screen<br> Working technology: HEPA technology.<br> Applicable scene: ventilation accessories.<br> Colour:As shown<br> Material:ABS<br> Size:16 x 10 x 8cm<br> Package Contents:<br> 3 x Replacement Filter