MARES DIN CONNECTOR 300 BAR – HEX WITH AST, Regulator AdapterMares DIN Connector 300 Bar Hex with AST Secure, Durable Regulator Connection The Mares DIN Connector 300 Bar Hex with AST provides a reliable and secure connection between your regulator and tank valve. Designed for professional divers and technicians, this high pressure DIN fitting ensures optimal sealing, long lasting durability, and easy installation with its hex configuration and built in Auto Sealing Technology (AST). 300 Bar Rated Connector