Emily from SWISCO responded:
September 30, 2022
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Emily from SWISCO responded:
October 7, 2022
The difference between these two strength options is the weight range they're calibrated to support. The 2530 stamp is for a sash weighing 15 to 19 pounds, and the 2540 stamp is for a sash that weighs 19 to 25 pounds. So with your 25 3 stamp, you would need the 2530 spring strength option. |