Square Hollow Section 1.Material grade:Q195-345 2.Standard:GB/ ... Certification:ISO9001/SGS/BV 4.Delivery Time:1 day Square Hollow Section1.Material grade:Q195-3452.Standard:GB/ASTM/JIS3. ... Welding, Punching Holes.7.Supply Ability: 20,000MT/Month.Square Hollow Section can be used in construction structure, machinery making,container ... , pls let me know Owned warehouse spot supply Square Hollow Section