Pack of 4 Compatible Replacement Filters for Pelican Water PC40-20 20" x 4.5" 5 Micron Sediment Replacement Filters and O-rings by IPW Industries Inc.This pack of four 20" x 4. 5" meltblown sediment filters from IPW Industries delivers reliable 5 micron filtration for whole house, well, and commercial water systems. Each filter includes an O ring and is designed as a compatible replacement for Pelican Water PC40 20 cartridges, offering the same filtration performance at a competitive value. SPECIFICATIONS Core Filter Specifications Dimensions 20" 4. 5" Standard Big Blue size Micron Rating 5 Micron