【Compatible Models】The humidifier replacement filters are compatible with Vornado Evap3, Evap1, Model 30, and Model 50 evaporative humidifiers. 【What You Get】2 Pack MD1-0002 Evaporative Humidifier Replacement Wicks. Compatible with Vornado MD1-0002 fits MD10002 MD10001 MD1-0001 EVAP1 EVAP3 Model 30 / 40 / 50 HU1-0021. Compatible with Holmes HM250 HM405 HM406 HM725 humidifiers 【High Quality】Made of environmentally friendly professional import filter paper to ensure optimal performance and a healthy lifestyle. 【Easy To Install】Simply take off your old filter and put this brand new one in its place. For best results, we advise you to fill the humidifier tank with distilled water instead of hard water. 【100% Satisfaction Guarantee】We provide 30-Day 100% money back support, if you have any question with our products, please contact us freely. 2-Pack Humidifier Wick Filter Replacement fit for Vornado Evap3, Evap1, Model 30, and Model 50 evaporative humidifiers. Filter Replacement fit for Vornado MD1-0002 Replacement Humidifier Wick.