I have windows that are approx. 9 years old bearing the labels: Series:Mark 40/50 Premium STD - AAMA/NWWDA 101/ I.S. 2-97 - H-LC25/35-52X96. The retainers that keep the spring loaded balance are breaking at the top and allowing the balance to move out of the window. Need replacement caps (not sure which ones) and any instructions available.
Thanks, Jason


