418304 is a National multi-purpose seal in an industrial size of 6 x 7.506 x 0.5. 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 418304Industrial seal size 6 x 7.506 x 0.5Genuine National partTech SpecsSeal size: 6 x 7.506 x 0.5