Usage Tips:Layer by layer cleaning filtration, can filter fine particles, convenient for use.An essential accessory for the oxygen generator, which effectively extends the life of the machine.Lightweight and small, easy to carry and install on the machine.Adopts international standard filter paper, high density, no pungent smell.Made of high quality ABS material, safe and environmentally friendly, stable and durable.Specification: Condition: 100% Brand Elements type: filter.Filter Screen Type: Composite Filter Screen Working technology: HEPA technology. Applicable scene: ventilation accessories. Colour:As shownMaterial:ABSSize:16 x 10 x 8cmPackage Contents:1 x Replacement FilterOnly the above package content, other products are not included.Note: Light shooting 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.