SCUBAPRO 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 routing options. It is built for professional, military, technical, and recreational divers who need superb cold water performance in a lightweight, small, compact size.