Motor, 4.5V Type 2 for 2-Prong Connectors with Middle Pin

Reference

6216b

BrickLink® #

6216m2

Motor, 4.5V Type 2 for 2-Prong Connectors with Middle Pin (part 6216b) is a LEGO element. CollectORbuild's catalog records it in 12 sets, including ERBIE the Robo-Car and Expert Builder Power Pack.