Seacure X Type Mouthpiece BIG NEWS! SEACURE ANNOUNCES IT'S NEW "X TYPE" MODEL. AND SEACURE CAN NOW FIT APEKS, POSEIDON + MANY REBREATHERS! Finding a mouthpiece that offers both unbeatable security and comfort has forever been the divers dilemma. SeaCure has been the definitive answer since 1992. The newest model, the Hi-Flow offers an expanded port, which provides increased air flow. It also includes a new one piece molding and sealing attachment. This device allows for easier molding and is then used to protect the regulator from debris and unwelcome guests during storage. The Hi-Flow is available in clear, blue, black and pink.