... height: 6m to 30m(6m,9m,12m,18m,24m,30m). CD/MD Type Wire Rope Hoist.Electric Wire Rope Hoist.Hoist ... to guarantee safety..*Four modle for the wire rope hoist..*CD-1 Four direction movement,Single speed(With electric trolley ... )..*CD-2 Two direction movement,Single speed(Without electric trolley)..*MD- ...