SPROCKET / HUB 1 SIDE. 10T Double Spaced. .65" X 65" square center hole, can also fit on 3/4" round shaft, 7.80"OD x 1.50" wide. Casting number 311614. 70311614 shows up on Planter Hopper Fertilizer 600 Series pull type. Casting number 311614. Hand written part number 70348732. Related 70309182 SPROCKET, driven (12T)