This is a A-K1005 Ring Gear, Flywheel PN: K1005Main Description As Following : A-K1005 Ring Gear, Flywheel P.N: K1005 Dim A (1): 105 TeethDim B (2): I.D. 11.98" / O.D. 13.30"Dim C (3): Width 0.55"Replaces: 1K1005 Replaces: K1005A WHITE TRACTOR , Crossed From: 1K1005 WHITE/ OLIVER/ MPL MOLINE Found in Section & Models : Engine Parts > Flywheels and Ring Gears, White/ Oliver/ Mpl Moline TRACTOR: SUPER 55 (Gas SN 6000>), White/ Oliver/ Mpl Moline TRACTOR: SUPER 66 (Gas / Row Crop SN 420001>, Std. SN, White/ Oliver/ Mpl Moline TRACTOR: SUPER 77 (Gas / Row Crop SN 320001>, Std. SN, White/ Oliver/ Mpl Moline TRACTOR: SUPER 88 (Gas / Row Crop SN 120001>, Std. SN, White/ Oliver/ Mpl Moline TRACTOR: 66 (Gas / Row Crop SN 420001>, Std. SN 470001, White/ Oliver/ Mpl Moline TRACTOR: 660 (Gas / Row Crop SN 420001>, Std. SN 47000, White/ Oliver/ Mpl Moline TRACTOR: 77 (Gas / Row Crop SN 320001>, Std. SN 269001, White/ Oliver/ Mpl Moline TRACTOR: 88 (Gas / Row Crop SN 120001>, Std. SN 820001 Associated Items : New Also A-FRM-IHOL, A-OL-O-SUP55, A-OL-P-SUPER55, A-OL-S-3VOLUME, A-SMO201, A-FRM-IHOL, A-OL-O-66SUPER, A-OL-P-66, A-OL-S-3VOLUME, A-SMO201, A-FRM-IHOL, A-OL-O-SUP7788, A-OL-P-SUP7777, A-OL-S-3VOLUME, A-SMO201, A-FRM-IHOL, A-OL-O-SUP7788, A-OL-P-88S88, A-OL-S-3VOLUME, A-SMO201 And : Inside Diameter: 11.98" Outside Diameter: 13.30" Replaces: 1K1005 Teeth: 105 Width: 0.55"