Crossbar telescopic : 2ft-3ft,4ft-7ft,5ft-8ft,6ft-10ft,7ft-12ft,8ft-14ft,9ft-16ft,10ft-18ft,11ft-20ft Upright telescopic : 3ft-5ft, 4ft-7ft, 5ft-8ft, 6ft-10ft,7ft-12ft,8ft-14ft,9ft-16ft, 10ft-18ft,11ft-20ft,6ft-14ft, 7ft-17ft, 8ft-20ft Base Plate : 290*290mm, 300*300mm, 400*400mm, 400*420mm,450*450mm, 500*500mm,600*600mm Application Wedding, exhibition, trade show, fashion show, concert, events, etc z