We are able to supply the square /rectangular hollow section as follow:Material:Q235 Square hollow section: 20*20mm-100*100mm wall thickness: 1.4-4.0mm If you need above product , please dont hesitate to contact me. Best regards,Miss gao,An Shan Ying Yat Trade Co., Ltd.AnShan HongMing Metallurgical Machinery Co., Ltd.Add. Renmin road. #116 Tiexi Dist. AnShan City Liaoning Prov. ChinaTel：0086-412-8510377 8515277 Fax：0086-412-8562503 E-mail: asyingyi11@163.com asyingyi11@126.com MSN: asyingyi11@hotmail.com Homepage：http://www.asyingyi.cn
