the dispenser requires an opening that is 1 inch in diameter

The ASI 39 Drywall Mounting Clamp features universal mounting slots that are designed to coordinate with self tapping metal screws

From the Tech Data

The ASI 1204-C18 Stainless Steel Heavy-Duty Shower Curtain Rod Support is an excellent option for completing a commercial washroom or bathroom in a hotel or hospital

The door is attached at the bottom with a concealed 3/16\"-diameter heavy-duty stainless steel multi-staked piano hinge

ASI 94696AC Automatic Combination Commercial Paper Towel Dispenser/Waste Receptacle, Recessed-Mounted, Stainless Steel Style-Wall to Floor Grab Bar the dispenser requires an openingFeaturing a sleek, modern look, the ASI 94696AC Paper Towel Dispenser and Waste Receptacle allows you to offer paper towels and a place to dispose of them in one convenient unit, which can help reduce messes in your commercial restroom facilities. Designed for recessed mounting, the unit requires a rough opening that measures 14 5 8 inches in length by 39 3 4 inches in height by 10 inches in depth. The paper towel dispenser holds rolls of paper towels