I have Milgard single hung windows. The balance is 33 inches long and has code 32 5 FX CMC 2 stamped on it. I think the correct part is 33 inch Series 385 Option 3250.
Does this seem correct to you? When I measure the bottom fitting I get 1 & 2/32 which I think is close enough to 1 & 3/32 called out.
Thanks
Chuck