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Casey from SWISCO responded:
January 29, 2020
Looking at your photos, I am more inclined to recommend our Series 390 balance as a replacement. This comes assembled with a 19-002 and 15-001 bottom balance shoe. I encourage you to compare your measurements with ours to confirm whether or not this replacement will work. When measuring the length of the balance, be sure to measure the metal portion only, excluding the nylon pieces. You mentioned your balances did not have any stamping or markings on it. In that case, you will need to weigh your sash on a scale and refer to the sash weight chart listed directly on the store page. |
