Older Spiral Window Balance

Hi: I need to replace this older spiral window balance. It is not marked, numbered or named at all. It is a Tilt window (vinyl); The only name I find on the window is "Thermo Air 88", no other numbers or other markings. It measures 23.5 inches and has a blue tip; without the white plastic casing the uncovered "coil" part measures 3/8, but with the casing it measures 1/2 inch. Can you match me a like item to replace it with? Thank you! Andre Avdoulos

Hello: Thanks for getting back to me so promptly. It measures 23 inches. I rent my house and unfortunately, my landlord does not know the make of the windows either. But he said to try one of yours. I will look at your Series 600 spiral balance. Thank you!