Bob from SWISCO responded:
December 5, 2019
Thanks for posting. See our 15-228 Pivot Shoe as well as the 15-150S Single Support. This system uses our Series 160 Coil Balances. To know what springs weights you need, look for stamp codes on the coil springs themselves. If there are none or you are uncertain, weigh your window sash. Give us that exact weight and we'll work out what you need. |