Not sure about your Mobeli Suction Grab Bar holding power? Add a set of stainless steel plates with adhesive backing to place your Mobeli Grab Bars just about anywhere. Great for grout lines or drywall areas. Set includes two 5" X 5" stainless steel plates with adhesive backing.
THE STANDARD SIZE FOR THE SUCTION CUPS ON MOBELI GRAB BARS ARE 4 3/4 inches