Marmaduke's Super Chamber 7 This is a Link-style rubber mouthpiece that produces a deep, mellow tone in the low register and a sharp tone in the high register. It has expressive power that rivals the original Link. Compared to Link metal mouthpieces, it creates a soft, spacious feel with a pleasant resonance in the low register. It's a very easy-to-play mouthpiece. No claims and no returns. Please do not purchase if you cannot agree to these terms. Thank you for looking.