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[0] Mouth Pieces [1] Mouth pieces are made with professional materials & fit snug to the teeth. [2] Mouth pieces are made with professional materials & fit snug to the teeth (Same procedures & products used by dentist.). [3] 
Mouth Pieces are not professional products(football mouth pieces) and leave gaps between the mouth piece & the teeth.
FAQ about Teeth Whitening Systems Dentist sell.
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