Thermo Pro DIN/K Standalone Valves (Typical Side) are Nitrox Ready, using oxygen compatible materials and when sealed in the original factory packaging are also free of organic and particle contamination. Each and every Thermo Pro DIN/K valve receives eight-step testing and is pressurized to full working pressure. These are NON-modular (aka "standalone") valves that cannot later be used with modular components such as H-adapters and manifold crossbars. Thermo does not manufacture a Left (Uncommon Side) version of their standalone valve.

• You may see this style of outlet variously described as Pro DIN/K, 200-Bar DIN/K (G 5/8" BSP), 232-Bar DIN/K, or 'Convertible'. All these different names apply to exactly the same style valve outlet, which is suitable for use with the 3442 psi service pressure cylinders and any DIN style regulator or (with use of the included insert) any yoke style regulator.
• Inlets have imperial 0.750-14 NPSM (3/4 NPS) neck threads for use with modern aluminum and steel SCUBA tanks manufactured for the North American market. Inlets also include a threaded 'dip tube' with hex opening suitable for easy dependable installation with a hex key.
• Nearly indestructible handwheel made from soft rubber formed around a stainless steel insert. The stainless steel insert ensures positive operation with long-lasting life. The large ribs make it easy to open or close the valve even while wearing gloves. The rubber with stainless steel insert handwheel design is the preferred choice of cave divers. The black handwheel is standard, and an optional green handwheel is available.
• A one-piece safety assembly (burst disk) eliminates the possibility of mismatched components. This greatly reduces the likelihood of accidental incorrect installation of the safety assembly and protects the integrity of your diving cylinder. The safety device is shielded by the valve body to avoid damage during transportation or while diving. Valves have a 5250 psi burst disk.

Why is the "40% MAX OXYGEN PREMIXED" label on Thermo Valves?