11 inch X 9 inch X 1-5/8 inch-25 Medium Duty Double Clutch With a Spline PTO Disc. Use Main disc size11 inch x 1-1/8 inch-10 Spline. For tractor models: MF165 Late, MF235, MF235 Orchard, MF245, MF245 Orchard, & MF255 Early