Tom from SWISCO responded:
September 20, 2011
If the spiral measures 24" in length, then you will need the S600-23 Spiral Balance. Please note, our balances come with a metal casing, not plastic.
Moving forward, I am a bit concerned that you need a black tip. Black tip balances are usually used for very heavy window sashes, weighing around 40 lbs. Normally used by schools and commercial windows. Please weigh your window sashes and give us the weight in lbs. before ordering replacements. |