R50-BBS Culligan Heavy-Duty Sediment Whole House Water Filter Cartridge - Replacement sediment filter cartridge removes coarse sand, rust, and scale particles. 50 micron (nominal) filtration. Durable, nonwoven pleated polyester construction, high flow rate/low pressure drop capabilities. Ideal for well applications. Filter life up to 6 months or 24,000 gallon. Use with filter. - Size: 9.75" H x 4.5" W x 4.5" D, Life of Product: 6 mo or 24,000 gal, Rating: 50 Microns