Two Stage Universal Pod Air Filter Patented seamless design allows maximum flow and dependability. Flex Core spring permits filter to bend for easier installation and to move during operation to help shake off dirt build-up. Durable vinyl mounting base will reduce down to sizes 1/4” (6mm) smaller than I.D. listed. Two Stage Pods are designed for very dirty or dusty conditions, combining the Flex Core spring with two layers of foam which allow longer service intervals. Outer pre-filter may be used dry for dusty conditions, or oiled for wet or muddy applications.The inner filter must always be oiled per instructions. Category: Uni Filter Two Stage Universal Pod Air FilterSpecifications Model: Pod universal Flange Inside Diameter: 2" Flange Length: 4" Height: 64 mm Outside diameter: 3.5" Filter material: Foam Number: 026351