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Bob from SWISCO responded:
June 5, 2020
This looks like either a 39-253LB & 39-253RB or the 39-438B & 39-439B. The key difference between these two sets of operators are the appendages at the end of the straight arms. The 39-253LB uses a square track slider sold separately, our 39-529, while the 39-438B uses a rectangular black slider that comes built-in to the straight arm. This slight difference effects window compatibility, so be sure to confirm what you have. |
