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New Product Ideas Acoustic Casement Windows Crank Open Glass Block Windows on China WDMA exterior text-align:-webkit-leftNew Product Ideas Acoustic Casement Windows Crank Open Glass Block Windows Product Description Material List 1. Our products strictly start with material selection procedure and go through a rigorous Examination by our staffs who are expert in quality management. 2. Patented design aluminum profile, many of the humanized design points. Profiles 1. Thermal break aluminum profiles 2. Aluminum alloy profiles 3. 1. 4~2. 0mm aluminum profile thickness