Hollis 100LX Octopus is moderately priced but with great performance and durability. Pneumatically balanced chrome-plated brass valve results in smooth, easy breathing. Comes standard with 36" (91cm) MiFlex hoses and orthodontic mouthpieces with dual color tabs. Is equipped with a reversible demand valve that can be converted from right-handed hose configuration to left handed hose configuration. The second stage has an adjustable Dive/Pre-Dive switch: Large Venturi lever has a soft rubber grip, which makes it easy to locate and use. Ergonomic exhaust channels bubbles away from field of view and reduces exhaust effort. Improved orthodontic mouthpiece with dual color tabs and a plastic cosmetic ring.