This is an Edelbrock #72050 Performer Fuel Solenoid.  Compact size with very low amp draw; a proven performer—can support up to 150 HP flow rate. 

Never installed; only used for display-----still has the factory tinned ends on the power leads.   Current Summit Discount Price is $69.95.    Fixed shipping of $4.00.   See my other auction items for more good deals on nitrous and hot rod parts-------------you may also call the shop at 702-596-2616 with questions.