One New Aftermarket Replacement Inner O-Ring Fits John Deere Tractor Models: 820, 920, 1020, 1120, 1520, 2020, 2120, 830, 930, 1030, 1130, 15320, 1630, 1830, 2030, 2130, (840, 940, 1040, 1140, 1640 -> Serial #438364), 1840, (2040, 2040S, 2140, 2240 -> Serial #438364). Industrial/Construction Models 300, 301, 310 (-SN 192000), 380 (->SN 192509), 400, 401, 410 (->SN 192000), 480, 480A (->SN 193099).Technical Information: OD: 10.627″ID: 10.359″Thickness: .134″ Replaces Part(s): R50703