There are many different specifications for household 220 volts of micro -electric gourds. You can choose according to the load. The length of the wire rope is 12 meters, 20 meters, and 30 meters. When using, you need to pay attention to the longer the steel wire rope. Micro -electric gourd lifting height: When less than or equal to 12 meters, the rated load can be greater than 12 meters, less than 20 meters or equal to 20 meters: 70%greater than 20 meters, less than equal to 30 meters , 20 meters can only hang 700 kg, 30 meters can only hang 500 kg