For Sale is a set of four gears. These are new and unused. I obtained from a Lime Co inventory reduction sale. These are in excellent condition. See photos of uniGear Inc Inspection Report sheets. Two gears are S.O. # 17731 with the following dimensions: bore 2.9533, OD 8.863, Face 2.360, DIA INT 4.7275, SPAN 3.4205. Two gears are S.O. # 17731A with the following dimensions: bore 2.9551, OD 8.863, FACE 2.362, DIA INT 4.528, SPAN 3.421. Questions are welcome - don't hesitate to reach out to us. Lime Co inventory tag identifies these work on an ATOX Mill Feed.