We have several older Milgard windows that are 45"W x 69"H, Aluminum frame single hung, and non tilt. Some of them have a need to have the sash balance and/or sash shoes replaced. I have removed one of the sash balances and measured it to be 33"H (from metal tip to metal tip, 1/2"W, 1/2"D. The sash balance is stamped with the part # 32 4 JO Caldwell. Can you help me match the Swisco part(s) that would be equivalent? Thanks in advance. Chas

