1.Aluminum swing window 2.Top-grade aluminum profile 3.top-brand hardware 4.Certificate: ISO 9001:2004 5.OEM &ODM 1. Excellent appearance with smooth shape, reasonable structure;2. Using European general hardware or China top-brand hardware;3. Good performance in air tightness, water proof and safety, effectively insulating sound and heat;4. Durable, stronger, (fireproof, antiseptic,bulletproof) ...