Bob from SWISCO responded:
July 7, 2020
The bottom coil shoe looks like the S161-08; just make sure the width and thickness match what's listed on the product page. The top section is the 15-086 Tandem Housing, along with either an S180-6 6 lb spring, or S180-9 9 lb spring. Unfortunately, and frustratingly, there's no reliable way to say which is the right way to read that number printed on the housing! To know for sure, I recommend you obtain the exact weight of the window sash. Give us that exact weight and we'll work it out for you. |