Square Tube :

Spec: 100X100~300x300mm   ; Thickness : 4.4~10.0mm

Rectangular Tube :

Spec:75x125~250x350mm   ; Thickness : 4.4~10.0mm

Standard: GB 6728,ASTM A500,JIS G3466 etc.

use for strauctural pipe such as civil works,architecture,piles,scaffolding etc.