I'm looking for two of these.

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Home Owner from Los Angeles

Dec 12, 2025 2:51 pm

This is from an IWC vinyl sash window. It's 25" long. Are they the same part for both left and right side? Thank you.

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Jasmine from SWISCO

Dec 12, 2025 4:11 pm

Thanks for your post! Based on the stamp, your balance length should be 24" excluding the top and bottom attachments. You'll need either the S351-24 or the S390-24 to replace your balances. To confirm the right series, you'll need to confirm the depth of your shoe.

Our 2350 stamp option should work for the replacements. But you may want to double check that your sash weigh falls between 23 to 27lbs.

Comparison of the S351 and S390 balance shoes.

Home Owner from Los Angeles

Dec 12, 2025 9:58 pm

Thank you! I will weigh it, but I'm fairly certain that it does fall within that range.

Jasmine from SWISCO

Dec 15, 2025 9:47 am

Happy to help! If you find that it doesn't, please take a look at the chart below the product description of the balance you need. There is a list showing the weight ranges each stamp will support.