Who makes these injectors?

[Flybiyou]

The body of them is metel silver color and one side has INP 401 and the other says MDL 550P so I am guessing they are 550's. I need to know what company it is though any one know where I might find my anwser.

 

[BoostedTalonTS]

Here:

http://www.cruzinperformance.com/fuelinj.html

If it looks similar to the injector at "7 o'clock" then is it a denso injector... Those numbers sound like Denso's P/Ns. What color is the plastic head?

 

[Steve Hebert]

While this does not list that exact one -
http://www.witchhunter.com/injectordata1.htm

It looks like it is one made by Nikki

 

[Flybiyou]

While this does not list that exact one -
http://www.witchhunter.com/injectordata1.htm

It looks like it is one made by Nikki

Never heard of Nikki. Who are they and are they anygood. Reminds me of my toy car I had when I was younger (NIkkio) and that thing was a POS. The tops are grey in color.
Thanks for the help guys.