... ,18×18,19×19,20×20,22×22,23×23,24×24,25×25,28×28,30×30,36×36,38×38 ... ×803) Rectangular pipes: Outside dimensions (mm)20×10,23×11,24×12,25×13,30×30,36×36,38×38,40 ... 25 days upon the receipt of deposit. stainless steel pipes,staircase round pipes,rectangular pipes,square pipes