This are the same rear tubs installed by the pros at Reklez Suspension Works. These are NOT your regular sized tubs these are over sized for big wide wheels. Measurements are 21" wide, 36" long, 14" tall. You can fit wide wheels up 15" wide. The tub kit comes with 2 rear tubs and 2 smooth fillers. You can upgrade to dimple die plates instead of the smooth plates for a cool custom look. Buy Today!