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Use one of the following methods to find your Narroline Double-Hung Sash Balance.
How To Find Your Window Model NumberThe model number is stamped on the side, top or bottom of the Andersen® insect screen frame. For example, 24310 is stamped on the insect screen as shown below. If you do not see the stamped model number, please search by the (lower sash) visible glass width and height.
How To Measure Your Window's Visible Glass SizeFrom the interior measure the dimension of the (lower sash) visible glass width and height in inches. The visible glass dimension is a measurement of the unobstructed glass that you can touch and see.
Visible Glass Width (Inches)