This is the great Replacement Foam Cabinet Filter, by DeVilbiss. It Measures approx. 3 5/8" W x 3 5/8" L x 5/8" H. It will fit the DeVilbiss 303 Series Oxygen Concentrators.
Features
The Foam Air Inlet Filter For Respironics Millennium Oxygen Concentrators is a reusable filter which replaces the Respironics OEM #H619. It measures approximately 4"W x 8"L x 1/4"H,...