Tusa RS681 Reg/Octo Bag Package

This package pairs the TUSA RS-681 regulator with a matching SS-81 octopus and an RCB-1 carrying bag, so your primary and backup air sources travel and perform as one set. The RS-681's R-600 first stage is an ultra-compact balanced diaphragm design with 2 HP and 4 LP ports, giving you room to route a computer, gauge, and inflator hose without crowding. It's paired with the S-81 second stage, which uses a Venturi adjustment lever, a Breathing Resistance Adjustment Control, and patented S.E.A. (Sequential Exhaust Assist) technology to keep breathing smooth, along with a built-in moisture exchange plate and an ortho-conscious mouthpiece. The whole assembly rides on a MIFLEX hose for added flexibility and less snag risk.

The TUSA Safe Second SS-81 octopus shares the same low-profile elliptical case and S.E.A. exhaust design as the primary second stage, so your backup breathes with the same familiar feel. It has its own adjustable Venturi lever, breathing resistance control knob, and ortho-conscious mouthpiece, and it comes in high-visibility yellow so a dive buddy can find it fast in an out-of-air situation.

The RCB-1 regulator bag rounds out the package, keeping the RS-681 and SS-81 protected between dives. It's fully lined with thick padding, closes with a durable zipper and pull tabs, and includes an internal pocket for your log book or manuals plus a shoulder strap for hands-free carrying. If you need cold water or DIN compatibility down the road, TUSA's EK-600 cold water kit (for temperatures below 50°F/10°C) and DIN-R600 conversion kit (300 bar/4350 psi) are available separately.

• Ultra-compact balanced diaphragm R-600 first stage with 2 HP and 4 LP ports for flexible hose routing
• S-81 second stage with patented S.E.A. (Sequential Exhaust Assist) technology and a built-in moisture exchange plate
• Breathing Resistance Adjustment Control and Venturi adjustment lever let you fine-tune airflow on the RS-681
• Attached MIFLEX hose adds flexibility and reduces snag risk underwater
• TUSA Safe Second SS-81 octopus in high-visibility yellow, built on the same low-profile elliptical case as the primary second stage
• SS-81 octopus has its own adjustable Venturi lever and breathing resistance control knob for independent airflow tuning
• RCB-1 regulator bag is fully lined with thick padding and closes with a durable zipper and pull tabs
• RCB-1 bag includes an internal pocket for your log book or manuals plus a shoulder strap for hands-free carrying
• Primary and backup second stages share the same ortho-conscious mouthpiece design and low-profile case shape for a consistent feel

• Tusa RS-681 Regulator
• Tusa Safe Second, SS-81
• Tusa Regulator Carrying Bag