Cart “Flat Vent Filter” has been added to your cart. Continue shopping Remove item Thumbnail image Product Price Quantity Subtotal × Inlet Filter, 5L Oxygen Concentrator (Set of 12) $89.99 Inlet Filter, 5L Oxygen Concentrator (Set of 12) quantity $179.98 × Flat Vent Filter $5.99 Flat Vent Filter quantity $5.99 Update cart Go To Checkout ► Cart totals Subtotal $185.97 Total $185.97 Go To Checkout ►