If you are willing to buy high quality,Website:http://www.lankgoogle.com, high performance, high efficiency and best selling square lifting column 70*70 two tubes type a, or if you want to import customizing multi-function square lifting column 70*70 two tubes type a of best price and high technology from one of leading square lifting column 70*70 two tubes type a manufacturers and supplier, please feel free to contact Ningbo Lank Linear Motion Co.,Ltd.square lifting column 70*70 two tubes type A Attn: Fit for 2 motors 2 columns series and 3 motors 3 columns series Max. loading (N):800 Stroke (mm):500 Min. Height (mm):650 Max. Height (mm):1150 input voltage(VDC): 24 Noise(db):<48 Net weight(KG):6Speed with Max. loading (mm/s) :28mm/s Dimension of outer tube(mm):70*70 Type of column : narrow top , wide bottom , two tubes Standard color:Black, white, grey Duty cycle:10% , 2 minutes of continuously work, rest 18 minutes