Electric chain hoist duty classification h4 mount type hook mounted No trolley maximum lifting capacity 2 000 lb number of speeds 1 fixed lift speed 20 fpm minimum lift speed not applicable maximum lift speed not applicable trolley speed 20 maximum lifting length 10 ft current at minimum voltage 6 a current at maximum voltage 6 a motor horsepower 1 3 4 hp operating voltage 230 460v ac headroom 21 9 32 in for minimum beam height not applicable warning: cancer and reproductive harm Www.P65warnings.Ca.Gov Nickel metallic