CASIO Digital Horn Mouthpiece - Used - For DH-100, DH-500, etc. Genuine product. The mouthpiece has a protrusion on the connection part, but there are also those without it, and they are mutually compatible. Please forgive any minor scratches as this is a used item. Compatible with: DH-100 DH-200 DH-280 DH-800 DH-500 etc.