Catalina Cylinders With Pro Valve SSV-C-48P Pony Bottle Tanks Size:30 Cu Use this data to track

Use this data to track and manage your exertion — and help avoid overexerting at the start of your run or bike

Combines perfectly with NeoSport Waterman John

Notes are easily readable for efficient underwater communication

Drawstring closure with cord lock

Catalina Cylinders With Pro Valve SSV-C-48P Pony Bottle Tanks Size:30 Cu Use this data to trackA pony bottle is the only truly redundant alternate air source you can rely on. In its essence, a pony bottle is simply a small gas tank that can be carried in addition to the main tank. You can choose to mount it either on your side, in front of your body or fix it to your main cylinder. Pony bottle tanks normally come in a few different sizes. The capacity you need will depend on how deep you plan to go and what type of diving you plan to do. This