2 boxes- 4 filters total

The Holmes x2 Replacement Wick Humidifier Filters (Type W) are designed for use with models HCM3888C and HCM3888B. These filters are made by the brand Holmes and are resistant to antimicrobial growth. With a pack of 2 filters, each filter is designed to improve the indoor air quality by moisturizing the air in your home or office. Made in Mexico, these replacement wick filters are essential for maintaining a healthy and comfortable environment in your living space.