What's up with these Injectors?? PICS!

I got these injectors from a guy that had em on his stang for under 300 miles till he stepped up to 42's for his setup. He says theyre' 38's and I did see the receipts for it saying 38lb. but there are 7 with a Blue ring and 1 with a Red one. what the hell? I searched and found out they're Lucas injectors (forgot to look at the receipt for the part name and #) the one with the blue rings have "D1163BA" on them and the red ring one has "D1163AA" on it and on the opposite side has 621030 on it. I searched and found EVERYBODY had the same situation, they had no clue what they were and can't find a defin answer on them. Help!

I don't care what they are but I just want to know they're all the same lb rating.
Click in the link for pics.
http://i18.tinypic.com/5y01rhs.jpg
http://i19.tinypic.com/52p487t.jpg