Tom from SWISCO responded:
May 9, 2017
Please see our 15-177 pivot shoe and Series 152 spring. I believe these should work for you. You will need the number on the old spring to identify a good match.
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Tom from SWISCO responded:
May 11, 2017
The stamp is usually near the end of the tip that fits into the shoe. If there is no stamp, give me the weight of the sash and how many springs are used on each side of the sash. That will let us calculate the best option!
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Tom from SWISCO responded:
May 12, 2017
I think that just may be it. Keep in mind that the S152-8 can carry 8 pounds each, so if you have one spring on each side of the sash it would be a total of 16 pounds. You may want to weigh your sash on a scale just to be 100% sure this is right.
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