Description guide: 1st external depth - 2nd external depth - 3rd thickness | M = metres, mm = millimetres
20mm square tube is available is manufactured from external grade rigid PVC which makes is suitable for using outside as well as inside. 20mm square tube is often used for framing, cables, covers and spacers. We offer other sizes of square tubes and samples can be sent to you if requested. High quality square plastic tubing is made in our UK factory.