1. Port-Hole 2. Model No.: AC-001 3. Material: Nylon 4. Size: 5 kinds for option 5. Usage: Use for air handling unit Guangzhou Yizhong Aluminum industry Co.Ltd. was established in 1993.Specialied in manufacturing industrial profiles such as Electronic radiator, Family property, Electronic production line, purified profiles, diffuser profiles, central air-conditioning profiles, thermal break ...