AWC Webinar 10 Chemical Feed and Dosing PumpsSEE THE PICKS IT IS THE CONTROL UNIT YOU GET. knight metering pump, control box, edge main system, part#7630536, 100% new. This item is in the category Business & Industrial\Hydraulics, Pneumatics, Pumps & Plumbing\Pumps & Pump Accessories\Metering & Dosing Pumps.