Need a new operator. Looks to be 10" arm. Handle says thermalgard. Truth is stamped on arm. One bracket has 40447 on it
Bob from SWISCO responded:
September 24, 2020
This looks like our 39-253RB to me. Take a look and see if you agree. For a new cover & handle, see either our 39-376 or 39-452, depending on what style you prefer. For new track sliders and stud brackets, see our 39-539 and 39-545 & 39-546.