600x600mm Air Conditioning Ceiling Air diffuser for HVAC

4-WAY Air diffuser Features: Made of high quality aluminium Removable core Opposed blade damper optional. Neck size(mm): 150x150, 200x200,225x225, 300x300,350x350,375x375,400x400,450x450 Our services and mission: * RAINSBOW is the leader of air diffusion technology .We concerntration on high quality and competitive price.We have strict qualtiy control process,and every product is hand inspected to ensure it will be in good quality condition . * RAINSBOW will work to develop