Respironics Everflo Universal Compressor Filter, Each

Like a good deal, and it works. Happy

Repeat purchase. Works well in my Everflo.

Good filter,good snug fit and made in U.S. A

It is the same filter that the concentrator uses. Very pleased

This item is physically the exact size of the manufactures filter including the location of ports. Where this filter goes beyond the manufacturers filter is this one has a clear cover which allows you to see the condition (dirt), of the filter material.Looking into the filter housing, the filtering layers of the item shows multiple layers. The more layers the better the filtration. It is unknown if the manufacturers filter is constructed in the same manner because the manufacturers filter has a solid color cover.I highly recommend this filter due to its "user friendly" design, ease of replacing the filter and reasonable cost.

Perfect fit, no problems.

Arrived today and for perfectly in my oxygen concentrater. Somehow measurements were smaller than stated but this was included in ratings. Exactly same size as my old one

Purchased unit is light transparent blue in color which allows one to see how dirty. Pic is of original grey unit after > 1000 hours of use indooors but user started to complain of odor or heat. So after installing new clear unit, I tore apart the unit and too a pic of pulled apart filter ' paper' both sides and left part near outlet in place. Notice black-dark side is near outlet, filter side is sort of grey, back side is white. Not shown is 1/4 inch foam pad paper filter sits on with small cutout to allow room inlet air from top to go thru filter to reach exit at bottom. Foam is mainly a spacer and not a filter.