Single width is 0.78m wide with 1 working platform per level. Each level is 4m height. Double width is 1.4m wide with 2 platforms per level. Both are available in 1.8m length and 1.4m length. Single width is suitable for area where you have space constraints like corridors, balcony & staircase. Double width has more space for storage of equipment and more stable since the width is bigger. Both can be erected up to 12m platform height. We will use a longer stabiliser bar (3.4m length) for 8m H and above. Below 8m height we use the standard size stabiliser (2.6m length).