This is the 2000mm high x 900mm wide shelves x 320mm deep, Supershelf galvanised steel adjustable shelving Starter Bay with 4-8 shelf levels. This is available as both a starter or add-on bay - the starter bay includes 2 vertical frames whereas the add-on bay includes only 1 as it will join onto an existing frame. Please add 110mm for the overall width of the starter bay and 10mm for the overall width of each add-on bay. This system comes with a two-year warranty.