Rapid Brass Gear and Steel Worm Drive Set 1:20 (3mm bores)

Brass-Gear-and-Steel-Wormdrive-Sets-Rapid-M0-5-20Z-P-Brass-gear-and-steel-worm-set-with-clockwise-thread-P-Rapid-Brass-Gear-and-Steel-Worm-Drive-Set-1-20-3mm-bores-

Price: 21.37 from Rapid Online Rapid Electronics Ltd.