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Tom from SWISCO responded:
May 27, 2020
Since your old stamp reads "27 9," the metal channel should be 28" long, not 29". You should double check to confirm. You will also need to weigh your sash on a scale to confirm the best stamp option, since any stamp ending in "9," like yours, uses an outdated rating system. One of the options for the S350-28 should work for you. We have a chart on that balance's store page you can use as a reference. We do offer volume pricing discounts. You can see a detailed breakdown on the S350-28 store page. |
