11 inch X 9 inch X 1-5/8 inch-25 Spline Heavy Duty Double Clutch With PTO Disc. Use Main disc size11 inch x 1-1/8 inch-10. For tractor models: MF175 Late, MF255 Late, MF265

11 inch X 1-1/8 inch-10 Spline Main Clutch Disc Woven. Ford tractor models: TO35, MF35, MF50, MF65, MF135, MF150, MF165, MF175, MF180, MF230, MF235, MF245, MF255, MF265

12 inch X 10 inch X 1-5/8 inch-25 Spline 12 Spring Double Clutch with PTO Disc Can Replace 1868005M91 & 1867438M92. For Massey Ferguson tractor models: 231,261,271,271X,271XE, 275,281, 282, 285S,283, 283UK,290, 383, 390 Prior to S/N B18008, 471,481