window channel and balances

A quick learner from Maui HI says:
Question 1 - My measurement of the channel is 27" . I don't know how to read the stamp on the channel, which reads " 26-5 1X CMC 7. Should I use my measurement of 27".

Question 2 - There is no Stamp weight on the balances. The window is approx 29X33 Double pane. Can you tell me which weight to order.

Question 3 - Please confirm that the S351-27 is the correct order.
User submitted photos of a window balance.
Profile picture of Paul
Paul from SWISCO responded:
Thanks for posting. A stamp of 26-5 usually corresponds to our 2650 option, but you can always weigh your sash on a scale to confirm. As for the Series itself, I cannot confirm if you have our Series 351 or Series 390 instead. You will need to carefully measure your shoe to determine which is the better match.
Reply to Thread
Use this form to ask a follow-up question or to share your experience regarding this subject.
(your email address will be kept private and is only used to inform you when a response has been made)