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The Gavin Port has a port creating space for the tongue, relieving some pressure. It is a strong bit which creates direct pressure on the bars.
The Gavin Port offers some tongue relief by spreading pressure across the bars. Pressure applied to the bars is direct and not softened by curvature. The Gavin Port is a solid mouthpiece and will not create a squeeze on the bars. The Gavin Port is available in Sweet Iron. The Sweet Iron material was chosen as a metal option as it oxidizes. Oxidization encourages salivation and acceptance of the mouthpiece. The solid, Gavin Port, has no movement.