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Post Tension Galvanized Spiral Flat Duct
Post Tension Spiral Corrugated Flat Duct, please check our pictures.
Good quality, good flat section, good strength and good strip.
the most popular size is 43*20mm, 50*20mm, 70*20mm, 90*20mm etc.
We could produce any quantity within minimum delivery time.
If you are interest, welcome to contact with us.
