The Vink Beef Calving Aid features a larger 35mm profile on the ratchet shaft, and therefore a larger top shaft bush is required than on the standard Vink model.
The beef model shaft bush 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.