A quick learner from Bella Vista Arkansas says:
March 22, 2014
Attached is a picture of weather strip off of a Atrium window. We have been in contact with them and they do not supply that part anymore and gave me your email. MFR. Code AB-1, Series 7700/7730 SH, H-R30-48x72, H-R50*-36x72 (MODIF). This is off a sticker that was on the window and there is no other info or engravings on the window.
Paul from SWISCO responded:
March 24, 2014
This looks a lot like our 58-183. Check it out and see if they match up.
A quick learner from Chicago, IL says:
October 16, 2014
Quick learner but not to sure how to send the picture:)
Dave from SWISCO responded:
October 20, 2014
Thank you! We carry three types of this style sill bubble. The 58-164 and 58-183 both have a .187 leg, which is close to 3/16" wide. They may work for you. We also carry the 58-171 with a a .270 leg, which is between 1/4" and 5/16" wide. I can't make out your size from the photo, but double check and see what you think.