Hurricane proof impact resistance Aluminium crank open casement window is a high-performance window product designed to withstand strong winds, hurricanes and other extreme weather conditions. It is made of high-strength Aluminium alloy, combined with advanced impact-resistant technology to ensure that it remains stable and reliable in bad weather, providing a solid guarantee for your home safety. The quality of our products is unquestionable. We have obtained NFRC international certification. And our production efficiency is also very high, with a monthly output of about 10000 square meters. We also provide a more than five-year warranty and after-sale service. Usually return and replacement, online technical support, free spare parts. And we choose suitable package and reinforce for various products when loading and transport. If you have any question, please don’t hesitate to contact us.