Optio 58BW ST HI Steel Replacement

The look of steel, the benefits of aluminium. A win-win for designers and homeowners alike. Featuring industry leading build quality, our 58BW ST HI aluminium windows are an ideal replacement for existing steel windows. In addition to impressive high thermal and acoustic performance, the design also replicates the minimal sight lines associated with steel windows, whilst providing superior performance and security. Yet another win-win.