uPVC Reversible Windows in Wales. ANY SIZE – ANY STYLE – ANY COLOUR – ANY SPECIFICATION. Our reversible upvc windows come made to measure in any size and in any colour. Manufactured from 70mm Grade ‘A’ uPVC Profile with reinforcement, our upvc reversible windows are only made from the highest quality materials. 1. Grade A uPVC Profile. 2. Reinforced Frames. 3. Internally Glazed for Added Security. 4. 28mm Pilkington K Glass. 5. High Quality Multipoint Locking. 6. 10 Year Guarantee