Specification:

Voice Coil Diameter: 51.5mm / 2.03 inch
Total Skeleton Height: 50mm / 1.97 inch
Copper Wire Height: 18mm / 0.71 inch
Coil Material: 2 Layers Round Copper Wire
Sound Film Material: Black Aluminum
Package Content: 1 x Voice Coil

Description:

A voice coil (consisting of a former, , and winding) is the coil of wire attached to the of a loudspeaker cone.
The item provides the motive force to the cone by the reaction of a magnetic field to the current passing through it.
It is also used for voice coil linear motors, which produce a larger force and move a longer distance but work on the same principle.