Apeks Black Sapphire Regulator, (Closeout Sale) Precision-machined and anodised metal front cover. Luxury hard-wearing PVD finish on the first stage. 5 ports with heat exchanger as standard. Hydrostatic over-balancing first stage allows the medium pressure air in the hose to increase at a rate faster than ambient pressure, resulting in superior performance at depth. Comes as standard with an environmental dry seal kit which keeps water and contaminants out as well as making the model more resistant to freezing. Features the innovative Diver Changeable Exhaust (DCE) system allowing the diver to change from a large air exhaust to a smaller air exhaust. The pneumatically balanced second stage has diver-adjustable controls that allow the diver to individually tailor the breathe of the regulator to meet his or her needs.