window balancer

Thanks for reaching out to us. We should be able to help with this. Can you upload clear and up-close photos of the top and bottom fittings? Can you also confirm the stamp printed on the metal channel?

Great, thank you! I recommend our Series 380 or Series 385, depending on the depth of the bottom fitting as shown in the image below. Just note that our metal channel width is 9/16" but is considered 1/2" in the trade. You will also need to weigh your sash on a scale to determine the proper strength option since your balance lacks a stamp. There's a chart under the product description on the S380 and S385 store pages that will tell you what option is best based on the sash weight. 

Comparison of the S378, S380 and S385 balance shoes.