This octopus is designed on the same platform as the high performance 221 2nd stage. 

• Pneumatically balanced second stage 
• Patented Orthodontic Mouthpiece with High-Density Bite Tabs 
• Ergonomic A.V.S. (Adjustable Venturi System) Dive/Pre-Dive Switch 
• High visibility yellow front cover 
• Comes with a Max Flex 37in yellow hose