... Hollow Sections,RHS Rectangular Hollow Sections ASTM A500 GR A B C D,more details as below: Description: Structure Pipes,SHS Square ... Hollow Sections,RHS Rectangular Hollow Sections Standard: ASTM A 500 GR A B C D Specification for Cold-Formed Welded and Seamless Carbon ... Steel Structural Tubing in Rounds and Shapes Grade (A, B, C, or D) Type: Square Welded Tubing(SHS) Size: Maximum periphery ...