Brand X - The top is not stainless, rather claimed to be "rust resistant". Assume plated steel. The fuel lines are clamped directly to the (stainless?) steel lines rather than using the quick-connect barb fittings that the lines are designed to utilize.
I did the magnet test on the metal parts. I used a neodymium magnet since they are strong. The magnet stuck to the top of the pump but not to the metal fuel tubes.
Chris Miles
For Better or Worse I own a DeLorean!
1983 Grey Manual, VIN #16409, Fresno, California