This is Chris from Tianjin Yuantaiderun Pipe Making Co.,Ltd. We are a Chinese compony that speciallizes in making steel pipes and would like to tell you about our line of products.Our products are special because they are made of good materials. In the last 13 years that we have been selling our products we have made a good name for ourselves in countries around the world. We could supply: Square Tube: 20*20*1.3mm~500*500*16mm Retangular Tube: 20*30*1.3mm~400*600*16mmYou could find our information on our official webesite:www.ytrxpipes.com If you have any further request about the steel pipe,please send me back or call me directly.Best Regards.