17 5/8 inch diameter, 3/4 inch hub, keyed shaft steering wheel for IH tractor models: Super A serial number 356000 and up, C serial number 75098 and up, Super C, Super H, H, M, MD, 4, 6, Super W6 and WD6, W9, WD9, Super WD9, 100, 130, 200, 230, 240, 300, 400

16 inch diameter, splined shaft steering wheel for IH tractor models: Hydro 70, 86, 100, 186; 404, 424, 444, 454, 464, 504, 544, 574, 606, 656, 664, 666, 674, 686, 706, 756, 766, 786, 806, 826, 856, 886, 966, 1026, 1066, 1086, 1206, 1256, 1456, 1466, 1486, 1566, 1568, 1586, 2400, 2404, 2444, 2500, 2504, 2544, 2606, 2656, 2706, 2756, 2806, 2856, 3088, 3288, 3388, 3488, 3588, 3688, 3788, 4366, 4386, 4568, 4586, 4786, 5088, 5288, 5488, 6388, 6588, 6788 (CAP SOLD SEPERATELY)