W211PPB4 Spherical Triple Lip Seals Round Bore Non-Relubricable Agricultural Bearing 2 3/16" Inch Inner Diameter W211PPB4 Spherical Triple Lip Seals Round Bore Non-Relubricable, Heavy Duty Disc Harrow bearing is made with triple lip seals to protect from corrosive environments, this seal is a one piece shroud cover with three molded contact seals, bearing is lubricated.