Product review (5 stars): Perfect fit!
This fit my Whirlpool RF378PXGQ0 oven perfectly! As others have said, the shaft is a little long and is made to be shortened simply by breaking a section off with a couple of pliers. It took longer to walk to the garage to get the pliers than it took to break that piece off! Installation is very simple; just pull one wire off the old and put it on the new: one at a time. The old one was only working at high, so it's nice to be able to vary the temperature setting on that burner again.