yes, but no matter what you put on it, the weight will make it droop after some time.
Thank you for your question. This part has a depth of 3/8", and the width (and diameter) are 2 1/4".
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THAT IS PROBABLY BECAUSE THE OLDER MODEL HAD ISSUES STAYING TIGHT
Mounting piece might be sold separately at Home Depot or you can purchase an inexpensive soap dish and use the bracket from it.
Behind the circle is a bracket that screws into sheet rock or wood or the cabinet - once the bracket is in place, you place the circle into position and a tiny screw on the side allows you to tighten holder into place/position