Open Box Ocean Reef Octopus -Secondary Regulator with Quick Connection HoseThis backup second stage is designed with balance and includes a standard downstream valve with a dive predive switch. It is equipped with a male quick connection part and a quick connection 120cm 48 QC Extraflex Yellow hose. It is highly recommended for IDM divers who use QCs or Buddies with QCs as it provides the option to bail out with a secondary conventional second stage or QC hard connection when necessary.