Product review (5 stars): Black or Red, it doesn't matter.
My Whirlpool Duet dryer was squealing like a dog being beaten. I could've cleaned the old rollers, re-greased them, and reinstalled them, but I didn't know that they were in good shape until I opened up the dryer. I couldn't have the dryer out of service for too long, so I had to have a set of rollers on hand. I installed the new kit and I now have a really quiet dryer - I also have time to clean and re-grease the older set if I need to do this again.