418305 is a National multi-purpose seal in an industrial size of 4.5 x 5.256 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 418305Industrial seal size 4.5 x 5.256 x 0.438Genuine National partTech SpecsSeal size: 4.5 x 5.256 x 0.438