Non-Tilt Window Channel Balance

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Quick Learner

Jan 8, 2026 1:25 pm

Markings > UNIQUE 19-D-40
Dimensions: 20 inches L (19 & 15/16" to be exact) x 1/2 inch W
- for 20 lbs window sash.

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2 Replies

Jasmine from SWISCO

Jan 9, 2026 3:06 pm

Hello,

This window balance can be replaced with either the S351-20 or the S390-20. To determine the correct match, you'll need to measure the depth of your bottom shoe.

For a 20lb sash, you'll need the 1950 stamp option. It will support a sash weighing between 18 to 21lbs.

Comparison of the S351 and S390 balance shoes.