1. It is made of excellent quality engineering plastic by injection molding, higher density and more firmly.
2., air inlet has stronger anti-aging ability, longer service life, better sealing, flexible opening,
3. It protects the air inlet with anti-bird nets.
4. Two pulleys design making it easy to open, reducing frication, and prolong its service life.
5. Air inlet door uses the pulleys device firstly to reduce frication and extend the service life of the rope.
6. Air guide plate for option which efficiently control the air direction.
7.Dimension: front size 605*325*120mm back size 540*265*120mm