Not sure what type window no markings. But might be Marvin long arm is 9.5 in short arm with angle a
is about 4.5 in I need operator on bay window that when u r standing in house opens from right to left
Paul from SWISCO responded:
December 29, 2014
How about our 39-031 and 39-032? These look very similar, but just make sure the dimensions match.