Apeks DB4+ 1st Stage Dive RegulatorIntroducing the latest innovation in scuba diving equipment, the high pressure ports and compact machined first stage of the Apeks DS4 platform make it a top choice for any diving enthusiast. The over moulded first stage endcap and environmental diaphragm prevent ice build up and protect the first stage from impact damage, ensuring optimal performance even in extreme conditions. The large surface area heat exchanger diaphragm clamp helps increase gas