Mustee 27F UTILATWIN Double Laundry/ Utility Tub- Premier. You will love your Mustee Utility tub! It is produced with Mustee's proprietary DURASTONE combination of fiberglass and crushed stone blended with special resins for extra strength and durability. With its high quality one piece construction, you will not have to worry about it falling apart at the seams. Wall model includes wall mounting bracket, side supports and mounting hardware for securing tub to concrete or stud wall.