Single Pressure Rating The Single Pressure Rating scale looks like...Watch Lesson
The Ported Kernel allows for movement in the mouthpiece, while keeping tongue pressure to a minimum.
The Ported Kernel removes bar pressure by preventing the bit from “breaking”. The port and the kernel act together to reduce the amount of tongue pressure exerted.
The Ported Kernel 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.