The 3M Filtrete Whole House Water Replacement Filter 4WH-QS-F01 is designed for use with the 4WH-Q Series model. This filter is a single pack unit specifically made for whole house filtration systems. With the brand's reputation for quality and the compatibility with the specified model, this filter ensures clean and safe water for your household needs. Easy to install and effective in removing impurities, this filter is a reliable choice for maintaining a clean water supply in your home.