Free Shipping 20PCS 91A Metal Pinion 9T 0.4M Metal Brass Motor Gears Shaft Hole Diameter 1mm Spare Parts For DIY Models
91A,center hole diameter 0.97mm,a little tight for 1mm shaft
Outer diameter 4.4mm
Quantity:20 pcs
9T,0.4M
Package include:
20x Gears