This is a DC12V-24V electromagnet used on household appliances such as vacuum cleaners.
Voltage: Current
5V, current: 18ma;
6V, current: 18ma;
9V, current: 31ma;
12V, current: 42ma;
18V, current: 65ma;
24V, current: 83ma;
30V, current: 103ma
Length of cable: 300mm, terminated on one end by a 2 position female header.
There is glue protection on the Electromagnetic back.
*The current at DC12V is only 42 MA, which makes it very easy to pick up a 0.9 kg fan. This is not its maximum suction strength.