This is the awesome ALPHA 8 High Vis Octo from Oceanic Features of this great octo include: OCEANIC Quality Super sturdy ABS/Polycarbonate housing Lighweight design, only 6 ounces Measures a little more than two and three-quarter inches in diameter Lightweight material and anatomically designed mouthpiece translate into a second stage that won&';t cause jaw strain Nitrox compatible to 40% Because you Deserve it! DIVE THE BEST!