Good evening, this kind of windows are in multi layer larch and built with a system of "lift-sliding window" this substantially for have a better air tightness and for support the three laminated glasses installed on his base, if you are interested I can share to you the name of the brand, but because you know, this windows are made in Italy and actually non imported in the US. Probably you can find something of equivalent in this market....but I'm sorry I can't help you in this specific case. I remain at your disposition, Jacopo..
Tollot&C LLC.
emccarty
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