ship list:

1 module 16teeth 1 pair; 

gear diameter:17mm

step diameter:14mm

step height:12mm

gear height:18mm

teeth length:6.5mm

inner hole: 6mm 

no the fix hole; 

This gear is not black hardness proceeding, it is not finish produce, you can make or did hardness and do hole by yourself!

If need hardness and make hole please contact by trademanage or by skype: abctrade3  tks!