MW vinyl window channel balances

Question

I have a few windows I need to replace the balances on, the markings on the balances are as follows

26x 4 need 10 balances
14 x 2 need 12 balances
26 x 5 need 14 balances
22x3 need 4 balances
20x 3 need 2 balances

These were the numbers stamped on the parts

Casey · Accepted Answer

It looks like you might have either a series 380 or series 385 channel balance. The difference between the the two balances lies in the shoe.The series 385 balance has the 15-004 shoe which is slightly larger from front to back, as illustrated.

Comparison of 15-004 and 15-005