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hollow section:
1)L 28*28*0.55 mm 38*38*0.55 mm
2)T 28*28*0.55 mm 38*38*0.55 mm
3)Z 28*28*0.55 mm 38*38*0.55 mm
4)Material of window or door frame
5)Min thickness can be 0.4 mm or less
6)Black Annealed Steel or Bright
7)ERW steel tube & pipe are our main exporting production
8)Round, square ,and rectangle shape are all offered
9)Usage:widely used in many constructions
Quality hollow section pipe
