National Oil Seals feature the following: A proprietary RediCoat sealant to eliminate bore leakage. Patented lay-down sealing lip design ensures long life in spite of extreme temperatures, shaft imperfections, shaft/bore misalignment and excessive shaft thrust or movement. Material Silicone Shaft Size 2" Housing Bore 2.746" Outer Diameter 2.75" Width 0.375"

NATIONAL Warranty Information 12 months