The Vevor whole house water filter replacement cartridge is designed for first-stage sediment filtration in a 3-stage whole home system. Its 5-micron polypropylene construction helps capture sand, rust, and suspended solids before they reach downstream filters and household equipment. The standard 4.5" x 20" size is compatible with most common whole house filter housings for easy replacement. Each cartridge is built for high flow and can filter up to 100,000 gallons of water. This 2-pack helps maintain cleaner water while reducing maintenance frequency.