12 in. 6-button spring loaded. For Case-IH Tractor Models: Super W6, 3088, 3288, 3688, 3688HC, 450, 560, 706, 756, 766, 786, 806, 826, 856, 886, 966, 986. For Case-IH Industrial Combine models: 2706, 2756, 2806, 2826, 2856.