XS Scuba's Valves are designed and manufactured for long life and heavy use. The Pro and Dedicated DIN Manifolds are no exception. Manifold is made of marine grade brass with triple bright chrome plating for long life protection in salt water. Precision Machined from high tension brass and chrome plated the valve stems will give years of service and corrosion free operation. Easy Grip soft rubber Safety Hand Wheel with Stainless Steel Insert ensures long life and large ribs make turning handle easy even when wearing gloves. This New Unique Safety Hand Wheel allows the diver to visually see if the valve is completely turned on and off with a set of colored rings that appear on the valve side of the hand wheel.