This is a A-R77401 O-Ring PN: R77401Main Description As Following : A-R77401 O-Ring P.N: R77401 RE10980 Manifold to Comp.Dim A (1): .78" I.D.Dim B (2): .094" WidthDim C (3): Std.# Code JDim D (4): Std. # Size P20 Stocked As: A-020X2.4MG Found in Section & Models : Air Conditioning Parts > O-rings/ Fittings/ Misc, John Deere BACKHOE: 300D, John Deere BACKHOE: 310D, John Deere BACKHOE: 315D, John Deere BACKHOE: 410D, John Deere BACKHOE: 510D, John Deere COMBINE: 9500 (Qty: 2), John Deere COMBINE: 9500SH (Qty: 2), John Deere COMBINE: 9600 (Qty: 2), John Deere COMPACT WHEEL LOADER: 344E, John Deere EXCAVATOR: 450, John Deere EXCAVATOR: 595D, John Deere EXCAVATOR: 690E, John Deere EXCAVATOR: 750, John Deere EXCAVATOR: 800C, John Deere GRADER: 670B, John Deere GRADER: 672B, John Deere GRADER: 770B, John Deere GRADER: 770BH, John Deere GRADER: 772B, John Deere GRADER: 772BH Associated Items : New Also A-JD-O-OMT32592, A-JD-P-PC922, A-JD-S-SM2064, A-SMJD58, A-SMJD58, A-SMJD59, A-SMJD59, A-JD-O-OMRW16854, A-JD-O-OMRW16854 And : RE10980 Manifold to Comp. Dim C (3): Std.# Code J Inside Diameter: 0.78" Standard Number: P20 Width: 0.094"