used PM Bullet 2

I got this used off ebay and if I remember correctly this is the bullet 2, but I think its missing a few parts, could anyone tell me what is missing and suggest a pump for it?

here is some photos

 

It looks somewhat like a bullet But its not like any P/M bullet I have ever seen and I have sold and saw as more then a few Bullets . But what I see missing is there should be 1. 1/8 mip x barbed adapters that screw into the top of the injector housing and a Little ball valve to control air inlet and a nipple into the other tapped home. I hope I'm wrong but that may well be a knock off of a bullet 2 what are the mesaurments of the skimmer's mixing box ? A bullet 2 measurements are


Overall Height
24”

Base Dimensions
6.75” x 10”

Inlet Size/Type


1”/ SOC

Outlet Size/Type
1.50”/FPT

 

measurements are exactly to what yours are. I just measured it, it may be a pm knock off and if it is for the money I spent I don't mind "$150" also there is a stamped pm logo on it as well.... not sure but what pump would you run with this?I am looking to do a manifold system with it but again not sure what I need

 

here a link to the pm website http://www.precisionmarine.com/html/protein_skimmers.html

 

the five recommended pumps for the bullet 2 starting with the highest rating are #1 pan world 150ps (6 thumbs up) #2 pan world 100px (5 thumbs up) #3 genx pcx40 ( 4 thumbs up) #4 mag 24 (3 thumbs up) #5 mag 18 (2 thumbs up) #6 sedra 12000 (1 thumb up). info from precision marines.