Humidifier Filter Replacement. Water Panel P110-3545 #35 Fits Aprilaire Model 600. see product for all models it fits

The Totaline P110-3545 Humidifier Water Panel Filter is constructed with honeycomb filtration to help trap waterborne mineral pollutants and will keep them from entering the indoor air of your home. 

• Fits 350, 360, 560, 560A, 568, 600, 700, 760, 760A, & 769 humidifiers. 
• Model # 560 600 265 260

*Filters should be changed 1-2 times annually*