Trident Comfort Bite Mouth Piece with Roof of Mouth Bridge and Rolled Edges Comfort Bite Mouth Piece with Roof of Mouth Bridge and Rolled Edges Roof of mouth bridge, Rolled edges for a comfortable fit Ultra-long lasting For use with most all scuba diving regulators Hypo-allergenic material, Available in Black and Clear with zip tie included House Of Scuba Is An Authorized Trident Dealer!