National 35X42X4 multi-purpose seal, an industrial seal sized 35 x 42 x 4, which is 1.378 x 1.654 x 0.157 inches. The size code gives the shaft, outside diameter and width, so you can match it to your measurements. A genuine National part from Pro Gear and Transmission.FeaturesNational 35X42X4 multi-purpose sealIndustrial seal size 35 x 42 x 4Inch size 1.378 x 1.654 x 0.157Genuine National partTech SpecsType: Multi-purpose industrial sealSize code: 35 x 42 x 4Size (in.): 1.378 x 1.654 x 0.157