Offering a rare and unique Holton sax mouthpiece. Metal table with bakelite rubber body. Alto sax dimensions. As pics indicate has a thumbscrew to tighten on horn. Opening is smaller than an alto sax mouthpiece. Opening at base 1/2" across approximately. Base opening smaller than alto sax I believe. Measures 3 1/2" height. Approx 3/4" across tip, 9/16" across opening. Has Patent Applied For stamped on base. Holton logo clearly legible. Has prominent teethwear on tip as in pics. A pad will help. Table is good, flat as in pics. A very rare and unique mouthpiece. Again be aware of dimensions and that it may not fit your instrument. Mouthpiece SOLD AS IS NO RETURNS OR REFUNDS for any reason, good luck.