Cut and added two returns to bedrooms that were not done on install. Material list One 12x12 return box One 12x12 return filter grill One 10x10 return box One 10x10 return filter grill Two 12 inch start collars Two 10 inch start collars 50 feet 9 inch flex 50 feet 8 inch flex One 12x12 filter One 10x10 filter.