Compatible models: Our wf813 humidifier filter replacement parts are compatible with: for Relion wf813, dh830 -830, dh832 -832, rcm832 rcm-832, rcm832n rcm-832n; for equare eq-2119-ul, eqwf813; for acare 813, 813, cm-832n,pcwf813 pcwf813-24; for robitusin -832; for -830; for protec wf813 -813. Enhanced filter: made of filter paper from environmental protection specialty. Size: 5.8x3.5x1.5 inches. We added aluminum foil material in the middle of the filter element to prolong the life of the filter. Strong and fine mesh is not easy to fold and can be used for a long time. Simple installation: just remove the old filter and put this -new filter in place. For the effect, we suggest that you fill the humidifier water tank with distilled water instead of hard water. Package content: 6 x wf813 humidifier filter element replacement. Replacing the filter element is quick and easy. Replace the filter at the beginning of each season or every 2 months to increase the humidity in your home. Colour:As Shown Material:paper Package Contents: 6 * filter Only the above package content, other products are not included. Note: Light reflection 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.