For the love of God can someone please tell me what the name of this little metal pipe with threads on each end is? Its the part circled in green with the green arrow pointing to it and it connects dual pressure regulators together. I order this as an upgrade but they came separated and Im finally kegging some home brew but the regulators are separated. I need to order one of these or at the very least, call my LHBS tomorrow in the morning and see if they have one but I dunno wtf its called and im not having any luck on the internet.