Milgard balancer and vent stops needed

Question

Hi folks,
I have a single-hung Milgard window that needs a 40-pound balancer per the attached image. I'm also in need of two pairs of those 2" U-shaped plastic vent stops that fit in the channel above the sash. One pair of 1" wide, and one pair of 1.5" wide.

I'm quite familiar with the operation and installation of the balancer and stops.
Dave

User submitted photos of a window balance.

Tom · Accepted Answer

Hi, Dave. Let's hop to it. To begin, this is a 27" balance (verify that, though), and when you go to select your "stamp option" you need to select 2640. However, check your sash weight. A 26 4 stamp usually indicates a weight between 19 and 26. If your sash weighs more than that, let us know.

The final part to the identification is the Series. You're dealing with either the Series 385 or the Series 380. The difference between the two lies in the shoe. Measure as shown below, and select a Series 380 if it measures 1", and Series 385 if it measures 1-3/32", as shown below.

If you'd like us to identify any further parts like a vent stop, send photos of each part.

Comparison of the S380 and S385 balance shoes.