Window balance identification help

Question

Metal part is 33" long and the channel is 5/8" deep and 1/2" wide on non open side of the U. Marked with 32 4 HQ CALDWELL. Is it a S385-33 with the option 3240? Just want to make sure.

Thanks!

Paul · Accepted Answer

Yes, you are correct in selecting an S385-33 side-load balance with a 3240 stamp option. You can verify the option by weighing your window sash, which should weigh between 23 and 28 pounds.