Module 0.2 8 Teeth Plastic Pinion, Interference Fit 0.6/0.7mm Shaft of Motor, for Horizonhobby Linear Servo 1-3 woking days $0.30 *
Module 0.3 7 Teeth Plastic Pinion, Fit 0.8mm Shaft of Motor 1-3 woking days From $0.20 * Further option: Thickness