Channel is 33" long.
Has spring plus string and pulley system. Fits into a non tilt window. The words on the channel are as follows :32 5 HR CALDWELL. Width is 3/8"
Paul from SWISCO responded:
November 18, 2016
Based on your pictures, you may want to consider our S385-33 channel balance. This comes with the 19-005 and 15-004 attachments. I recommend looking over our information to confirm that this hardware matches what you have now.