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Fulmers
In the manufacture of bits with mouthpieces made of a softer material such as Copper, Rubber, Vulcanite, Nathe, Nylon,Happy Mouth, Flexi etc, the components are of the highest quality and have been tested extensively.
If the mouthpiece is faulty it will be replaced. However, mouthpieces that are chewed, ill-fitted or placed under unnatural force or pressure can often result in premature wear or other damage which the supplier cannot be held responsible.