Replacement

Question

Can't find the correct coil and has no markings for weight.
Its for a small bath window. I can buy a 5 or 6 or 7 if I have to

Bob · Accepted Answer

Hello there. This looks like it might be the 15-102 Side Carrier. Please compare. It works with Series 145 Coil balance springs. To know what weights to select, weigh the window sash. You can use that exact weight to calculate the right coil spring options. See below.