This is from a Jordan Window installed in 1990. I ordered 18-009 but it's about 1/4 inch too short. I'm thinking I need 18-199. Can you please confirm? I don't see that piece of aluminum in the pictures of 18-199 but maybe they don't include that after market?
I agree that your top sash guide is similar to the 18-199 but the dimensions would be the determining factor. Unfortunately, we are not able to make out accurate measurements from photos but we'll include the specifications from our product page below to compare to your part. Ours does not come with the same metal backing but that wouldn't be a dealbreaker as long as it is the same size. If you notice any discrepancies, please get back to us with your measurements written out to confirm if a closer match is available. Thank you!