The unique and simple opening method allows you to freely communicate with the world outside the window. In addition to inheriting the excellent manufacturing quality allowing consumers to obtain the most comfortable operating experience and at the same time reduce the number of mistaken operating methods. The probability of product damage. The development of Ultra casement window from the environmental and climate changes in Taiwan, and matched consumer demand . Through product R&D design, the product's durability and strength are enhanced, making it an epoch-making and forward-looking.