Non tilt block and tackle windows balancers with wing - looking for 2 x replacement parts (for each side)

Question

There are no names, numbers or markings on existing balancer. Metal to metal length is 29 inches. Photo of the window attached so you can see where the balancer goes. It's a single hung window with W X H dimensions of 35.5" x 32" for each sash (or 35.5" x 64" for the entire window)

Can you please help me identify the exact size of the replacement balancer part to purchase? Thank you.

Tom · Accepted Answer

Thanks for your photos. Based on what I see here, you have either our S380-29 or S385-29, depending on the depth of the bottom shoe. That's the only difference between them. I recommend measuring your shoe and referring to our dimensions to confirm the best match.

If there are no markings or stamps on your metal channel, then you will need to weigh your sash to determine the appropriate stamp option. Make sure to visit the store pages linked to in this post to see the weight charts for each product.

Comparison of the S378, S380 and S385 balance shoes.