Paul from SWISCO responded:
June 30, 2021
Hello! It looks like you need the Series 390 side load balance. Is there a stamp on your metal channel? If not, you'll need to remove and weigh your window sash to choose the appropriate spring strength option. There's a chart on the S390's product page that shows you which option you'll need based on the weight of your sash. |
Paul from SWISCO responded:
July 1, 2021
Yes! So, you'll need the S390-31 with a spring strength option of 3030. |
Emily from SWISCO responded:
July 7, 2021
You'll be able to see the pricing for your desired quantity at checkout before you place an order. |