9" , 10" 11" Lathe 22 and 16/32 tooth Nylon gear manufacturer part numbers LA-498, LA-500a This fine Nylon gear has improved design for better durability and performance compare to OEM and superior to other replacements Made out of Nylon - tough and flexible plastic Nylon naturally slippery, no lubrication required! Runs quieter and smoother Only Nylons should be used for gears where a slippery surface is desired. All other materials (PLA, ABS, PET, etc.) will grind creating a plastic dust and eventually fail! For details, please review all pictures LA-500-A DP: 16 16 tooth gear OD: 1.125" tooth width 0.28" 32 tooth Gear OD. : 2.125" tooth width 0.31" Overall width 0.59" Bore 9/16" (0.563") with 5/32 key LA-498 22 tooth gear OD: 1.5" Hub width 0.495, tooth width 0.25 Gear face width: 1/4"" 0.25" Shoulder width: 1/4" Overall width 1/2" Center bore: 3/4" (0.75") with 0.125 key Do not waste your money on ABS or PLA plastic gear that may strip or even melt! Introductory price - please share installed images and review.