WildHorn Outfitters Seaview 180&deg; Extra Snorkel Tube for Seaview 180&deg; Snorkel Masks DRY SNORKEL TECHNOLOGY stops salt water from getting into your mouth and prevents gagging. Spend less time worrying about water in your mask and more time snorkeling! FITS all Seaview 180 Snorkel Masks TUBE ONLY- Mask not included