The Vink Beef Calving Aid requires a larger yoke than the standard vink model.
The Beef replacement Yoke is designed specifically for the Vink Beef Calving Aid and as such will only fit the larger calving aid and can't be used on the standard model.
Please check if you have the standard or beef model before ordering spares.
Part of the complete Calving Jack, Aids and Spares Collection.