Features: Balanced and fast Dual-cylinder lifting system Single point lock release Chain-driven system Automatic safety locks,easy to operate Low ceiling design Cable-equalization system Triplicate safety locks Plastic powder coat finish Working noise 75dB ( A ) Rise time 50s Drop time 40s Working temperature -5 ~ 40 Motor power 2.2Kw/220 ~ 380V Working pressure 14Mpa relative humidity 80% Using altitude 1000m lifting capacity 8000lbs/3800kgs Lifting height 1850mm Clearance between posts 2500mm Overall height 2788mm 20 container 24 sets 40 container 40 set