The 20 x 4.5 inch polypropylene filter replacement kit by Tier1 includes everything you need for filter change maintenance. The exclusive kit includes a 5 micron polypropylene DGD-5005-20 Pentek comparable filter, replacement O-ring and lubricant packet to make your next filter change a breeze. The experts at Tier1 have worked hard to ensure this kit contains the filter and component you need to finish the job. Water taste and quality is critical business, keep your water clean with the DGD-5005-20 Pentek comparable filter by Tier1. This kit reduces dirt, rust and corrosion while it captures sediment as small as 5 microns. The system installs quickly and easily, order today!