15X21X3 is a National multi-purpose seal in an industrial seal size of 0.591 x 0.827 x 0.118 in. Pro Gear and Transmission sells it as a genuine National part. It is listed in our National Seals category alongside related National seals and O-rings.FeaturesNational multi-purpose sealIndustrial seal size 0.591 x 0.827 x 0.118 in.Size code 15X21X3Genuine National partTech SpecsBrand: NationalPart type: Multi-Purpose SealSize: 0.591 x 0.827 x 0.118 in.