This is a FDM made Nylon gear set of two
This gear made out of out of Nylon - tough and flexible plastic
No lubrication required
Only Nylons should be used for gears where a slippery surface is desired.
All other materials (PLA, ABC, PET, etc.) will grind creating a plastic dust and eventually fail!
For details, please review all pictures
Do not waste money for ABS, PLA plastic gear that may strip or melt