Ball, 1-3/8" wide. Category II.
Also compatible with...
Ford: 2000, 2100, 2110, 2120, 2150, 230A, 233, 2600, 2610, 2810, 2910, 3000, 3100, 3120, 3230, 3300, 3310, 334, 340, 3400, 340A, 340B, 345C, 345D, 3500, 3550, 3600, 3600N, 3610, 3900, 3910, 3930, 4000, 4100, 4110, 4130, 4140, 4400, 4410, 445, 445A, 445C, 445D, 450, 4500, 4600, 4600SU, 4610, 4610SU, 4630, 4830, 5000, 5030, 5100, 5110, 515, 5200, 532, 535, 540, 540A, 540B, 545, 545A, 545C, 545D, 5610, 5900, 6410, 6610, 6710, 6810, 7000, 7100, 7200, 7610, 7710, Fordson Major Diesel, LCG Models, Power Major, Super Major