Heavy Metal Base The base is made of good quality iron. And the large contact area as well as the weight ensure the stable support. Meanwhile, the heavy duty flat base can avoid the exposure of stand Retractable Crossbar Max 10ft width - the telescopic design is adopted to make the width of the cross bar easily adjustable. The minimum width is 63inch/5.2ft, and the maximum width is 120inch/10ft. It can adapt to backdrops of different sizes. Refer to the product manual for specific dimensions and installation Durable Light Stand Max 8.5ft height - The stand is made of good quality aluminum alloy, which is both durable and sturdy; Use the knob lock to adjust the height from 36inch/3ft-102inch/8.5ft Convenient Assembly The metal background support stand is easy to install and can be quickly assembled in a few minutes.