Our 20mm x 20mm steel box section is high quality and fit for a range of applications. metals4U is the leading online metal supplier, delivering quality products to tradespeople, contractors, and keen hobbyists across the UK. You can buy a 20mm x 20mm steel box section 3 metres or 6 metres in length or use our free custom cutting service to meet your own specifications. All the information you need on this 20mm x 20mm x 2mm mild steel box section can be found on this page, including details on grade, corrosion resistance, weldability and more. Need a job done fast? Order before 2pm and take advantage of our 'same day' dispatch policy.