[Compatible] For HEV-680B, HEV-680W, -6009, -6011i, -6011WW, -6012i, -6013i, -14V1, -14, -14N, HM-3500 Series, SCM-3500 Series, Compatible with -14V1, -14, -14N. [Easy Installation] We advise you to fill the humidifier tank with distilled water instead of hard water. Easy to replace, 1. Open the humidifier cover and the old wicking pad; 2. put the new humidifier wick filter in its old position; 3. Install the cover to complete the replacement. [High Performance] For best performance, it is recommended to repalce the humidifier pads every 2-3 months, depending on usage and water hardness, It captures mineral from hard water and distribute moisture more evenly and thoroughly throughout your home. [Humidifier Pads Refill] Content-humidifier filter replacement. Material: wood pulp paper colour: white Package Contents: 4 x humidifier replacement filters Replacement 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.