Black Duo-Flex Silicone Mouthpiece - HS CODE - 9506290000  C.O.O. - TW All Black dual material technical Regulator or Snorkel mouthpiece, which gives you the advanced comfort of a silicone body with the strength and durability of a tough bite flange. Ergonomically shaped to suit your mouth perfectly and provides an attractive modern & stylish look. Designed to be used on most SCUBA Diving Regulator 2nd Stages & virtually all types of snorkel with separate mouthpiece. Manufactured from tough but soft technical Black coloured flexible hypo-allergenic silicone and a small amount of enclosed rubber, a tie wrap fastening is included for convenient and fast fitting.