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This O-ring is made out of 5/16" diameter material. 2 7/8" outside diameter against the extra weight in the compactness of the ring allows for a more stable feel and quick release. The mouthpiece is made of ½” sweet iron and has three equal breaks. This allows for tongue relief, while intensifying the pressure on the outside of the bars.
Mouth: 5 ¼” Rings: 2 ½”
*Item may drop ship from manufacturer