[Part #] 4 [Part Name] Speed controller [Function] Allows for varying the speed of the motor and impeller. [Material] Plastic plates with copper connectors [Category] 
Motion Conversion Element
I n p u t
O u t p u t
M o t i o n C o n v e r s i o n E l e m e n t
S t r u c t u r a l C o m p o n e n t s
T r a n s m i s s i o n