Need 4 replacement

Hello,

I would recommend starting by looking at the S600-30 or S900-30 spiral balances, depending on the diameter of your outer tube. The balance in your photo appears to be missing at least part of the tube, so it's important to locate an undamaged balance from one of your windows to get an accurate measurement. You'll also need a blue top option for your replacement balances based on the tip color shown in your photo. Thank you.