9" , 10" 11" Lathe 22 and 16 tooth Nylon gear manufacturer part number LA-500 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 DP: 16 16 tooth gear OD: 1.125" tooth width 0.325" Overall width 0.325" Bore 9/16" (0.563") 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.