Used Scubapro MK19 EVO First Stage RegulatorSCUBAPRO engineers have created the all new MK19 EVO, taking the best features from our past air balanced first stages. It is environmentally sealed, preventing water and pollutants from entering the inner mechanism. The MK19 EVO has a new dry ambient pressure chamber that enhances freezing resistance, ensuring consistent airflow and maximum durability in the coldest conditions. With a swivel turret and five LP ports, this first stage maximises hose