GT Steel + Master Pro + GT Steel + Master 1St + 2nd Stage + Octopus DIN

The Cressi GT Steel DIN 300 + Master Pro + Master Octo regulator is a serious performer.

The GT Steel DIN 300 1st stage is precision-machined from marine-grade 316 stainless steel for professional and technical divers using 300-bar cylinders.

Stainless steel is exceptionally durable, and even after years of use in salt water, it won’t corrode. It’s also a more eco-considered option than traditional plated-brass first stages, because there’s no chemical finishing process.

There are five low-pressure ports on a swivel turret, one positioned on top for sidemount rigs, and two angled high-pressure ports on the main body to keep hose routing clean and your profile streamlined.

The GT Steel is environmentally sealed to prevent freezing and contamination, and the hyper-balanced diaphragm adjusts airflow to match ambient water pressure, maintaining consistent breathing performance regardless of depth, breathing rate or cylinder pressure.

The Master Pro 2nd-stage and Master Octo complete this powerhouse of a regulator. The housings are made of medical-grade plastic that inhibits bacterial growth caused by saliva and moisture inside the regulator, and is highly resistant to saltwater degradation.

Stainless-steel inserts on the front covers have precisely positioned ports that neutralise dynamic water pressure and eliminate current-induced free flow.

Both have an adjustable Venturi, and the Master Pro has a large, easy-to-grip breathing effort adjuster so divers can fine-tune the breathing resistance.

• Cold Water Certified EN 250 A < 10°C
• Designed for use with 300-bar cyclinders, this compact stainless steel 1st stage body won't corrode, and is more sustainable than brass
• The Hyperbalanced Diaphragm DIN 1st stage increases airflow as cylinder pressure drops, for a consistent breathing experience at all depths
• Environmentally sealed for cold/warm water diving - the 1st stage chamber stays dry, protecting the internal parts from freezing and contamination
• 2 7/16” HP ports UNF 5 3/8” MP ports UNF With a rotating turret for optimal hose routing and specific sidemount setups
• Cressi’s PressureSync technology maintains Intermediate Pressure during the breathing cycle for a consistent breathing experience.
• Advanced pneumatically balanced 2nd stage reduces breathing effort at any depth, for an exceptionally smooth breathe during demanding dives
• Adjustable Venturi maximises airflow in dive mode, prevents free-flows at the surface in pre-dive mode, and can be set to any position between the two
• Large inhalation effort adjuster is easy to use with thick gloves and allows the diver to personalise the breathing experience for optimal comfort