R30-20BB 155430-43 Pentek Pleated Polyester Filter Cartridge Comparable Replacement Kit with O-ring and Lubricant by Tier1 (20 inches x 4-1/2 inches, 30 Micron)The 20 x 4. 5 inch pleated polyester filter replacment kit by Tier1 includes everything you need for filter change maintenance. The exclusive kit includes a 30 micron pleated polyester R30 20BB 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. The R30 20BB Pentek comparable