Mbu-23/p Usn Oxygen Mask Com Cord Kit #01 For Gentex Hgu Flight Helmet Jun 1, 2020 mbu-23p 1 COMMUNICATION KIT for: GENTEX MBU-23/P USN OXYGEN MASK. 01EA GREY COM CORD KEEPER. 01EA PIGTAIL EXTENTION CORD. 01EA DYNAMIC MIC KIT [BOLTS & RUBBER WASHER INSTALLED]. GENTEX, OXYGEN MASK, US N...