we offer steel hollow sections. this is a type of metal profile with a hollow tubular cross section. the shapes available are rectangular and square. size:square hollow section: 12 x 12mm to 400 x 400mmrectangular hollow section: 19 x 9mm to 400 x 300mm standard: british - bs, american - astm, euronorms - en & japanese jisnote: standards other than shown above may also be available.