This 18mm/18mm Shisha Filter features a matrix percolator. The Shisha Filter features a 18mm female connector on top and a 45° 18mm male connector to attach to your shisha pipe.
The matrix percolator is a cylinder that is located at the centre of the shisha pipe base. It often has both vertical and horizontal slits, giving you the super high volumes of vapour diffusion. It helps the shisha pipe produce a much smoother hit.