Interchangeable w/ C/R, National, Stemco & Meritor OEM Approved Superior Axle Shoulder Coverage W/ Integral Axle Ring Triple-Lip Dirt Exclusion System Superior Graphite-Loaded Rubber Compound- On One Piece Seals Rubber Impregnated Leather- On Two Piece Seals Lubricant Compatibility Performs w/ All TMC Recognized Hub Lubricants Large Vent Holes Allow Lubricant to Flow To & From the Seal Reinforced Outer Seal Casing Built-In End Play Feature- Helps Compensate for Bearing End Play All Popular One-Piece & Two-Piece Oil/Grease/Bath Seals Available No Tools Required