Premium Quality Replacement PartRear Differential Seal & O ring For Yamaha Models:GRIZZLY 660 4×4 2004 Order Includes:1 x O Ring | 93211-54698-00 93211-51749-00 1 x O Ring | 93210-626A7-00 93210-63514-001 x O Ring | 93210-19123-00 93210-19800-00 93210-19809-00 2 x Oil Seal | 93102-65004-00 93102-65008-001 x Oil Seal | 93102-35009-00Dimensions:Oil Seal 1Inner Diameter: 63mm | 2.48″Outer Diameter: 90mm | 3.54″Thickness: 9mm | 0.35″Oil Seal 2Inner Diameter: 33mm | 1.30″Outer Diameter: 61mm | 2.40″Thickness: 9mm | 0.35″**