Part Number K4524 - A New Snap Ring For The PTO Bearing Housing On A New Idea 309, 310, 323, 324, 325 Corn Pickers, New Idea 272 Mower Conditioner, New Idea 545, 4296, 7300, 7800, 8700, 8900, 9700 Combines.  Old Part Number is W9711820.