Mustee 19F UTILATUB 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. This floor model includes heavy gauge steel legs with adjustable levelers.