Product review (5 stars): Excellent
I bought the 27-inch kit for a Whirlpool Electric Duet dryer, model GEW9200LW0.  What I received was genuine FSP/Whirlpool parts and so for the price this was far more reasonable than buying the parts separately.  My dryer was making loud squeaking noises.  I followed a video instruction found on repairclinic.  There were some differences between what they showed and my dryer but it was similar. You generally need to take the entire dryer apart and remove the drum.  The job took me just short of 3 hours which included a thorough cleaning of all lint and dirt within the cabinet as well as the roller shafts.  There were 4 rollers to replace - 2 in the back and 2 on the front panel.  When I got to them, the source of my noise was one back roller that had come off the shaft. The rollers still looked in good shape as did the belt, but I replaced everything in good measure, including the pulley wheel which was slightly bigger than the original, but looked like an enhanced design and still had plenty of clearance for the drum to pass over it.  The kit only had 8 plastic triangle pieces, 2 for each roller.  These pieces go on the shafts and prevent the roller from coming off.  The kit did not have a 9th triangle for the pulley so be sure to save at least one triangle as you remove the old parts.  I used some simple green to clean all the shafts and then wiped some White Lightning Clean Bike Chain Lube on each of the shafts.  You're not supposed to put grease on the shafts as this will attract lint and dirt, but the White Lightning is made to lubricate bike chains and it resists dirt, so I felt okay putting a little on each shaft and it did seem to make a difference in a smoother roll.  Keep track of all the screws you remove as I wound up having 2 extra after closing everything up, so I'm sure I missed somethiing, but all in all the dryer is much quieter now and for the $ was a great maintenance to perform on a 12 year old dryer.