ResMed Inlet Filter Pack for Astral 100 and 150 Ventilator, 4 Pack

The ResMed Astral Inlet Filter Pack includes four disposable air inlet filters and one filter cover muffler. The filters help prevent dust, dirt, and other airborne particles from entering the ventilator. Compatible With: ResMed Astral 100 and Astral 150 Contents: 4 air inlet filters and 1 filter cover muffler Type: Disposable, non-washable filters Replacement: Replace every 6 months or sooner if visibly dirty