Product review (4 stars): Porcelain coating
I needed to replace our old gray "porcelain" drip pans because they had food by-products baked onto them.  These clean easier than all metal pans but don't let that fool you.  These must have a coating of porcelain because a magnet will stick to them.  The black color makes them harder to see burnt food stuff so I now clean these more often than before.  But that's your choice.  The fine print on the instructions state they should not be put in the oven on the self-clean cycle. The fit in our GE range was good, not fantastic, but it works.