418306 is a National multi-purpose seal in an industrial size of 3.125 x 4.254 x 0.438. It is a genuine National part from Pro Gear and Transmission, and we are glad to help you match it to your application.FeaturesNational multi-purpose seal, part number 418306Industrial seal size 3.125 x 4.254 x 0.438Genuine National partTech SpecsSeal size: 3.125 x 4.254 x 0.438