The listing is for one piece of genuine B&W speaker rear bass hole bung.

This is from my B&W CM4 speaker. It will fit also to any other speakers with 50mm inverter hole. Bung is around 50mm in diameter and 50mm in length.

It will change the sound of a speaker. Bunged it will sound faster as it makes the drivers push harder.

Will dispatch quick and free of charge or you are welcome to collect.

MS416