21T/5mm M1 Hardened Steel Pinion Gear (1pc)

Hobbyking 21T/5mm M1 Hardened Steel Pinion Gear. Supplied complete with shaft locking grub screw. 

Specs: 
Material: Hardened steel 
Finish: Hard coated 
Pitch: M1
To Fit Shaft Size: 5mm 
Teeth: 21
Weight: 18.58g