Home Revolution Replacement Humidifier Filter, Fits Part HAC-504AW & Honeywell HCM-300T, HCM-315T, HCM-600 HCM-710 Models Designed to fit: Honeywell Part HAC-504AW and humidifier models HCM-300T, HCM-315T, HCM-600 and HCM-710 Replace with confidence: We back all of our products with a 100% satisfaction guarantee Breathe easy: Layered wicking filtration system prevents dirt, dust, minerals, and mold particles from being released into your home & keeps the air you breathe fresh and clean The Home Revolution Mantra: High-quality replacement products at a low price What you get: 1 humidifier wicking filter