Combat Edge MBU-20 Oxygen Mask Gentex parts. Face piece size medium wide. And not for actual use. This is not a complete mask. Please look pictures to be sure that.The item "Oxygen Mask MBU-20 parts Gentex Combat Edge Pilot Flight Helmet" is in sale since Thursday, February 21, 2019. This item is in the category "Collectibles\Militaria\Surplus\Hats & Helmets". The seller is "cretanman" and is located in FPO, Armed Forces Europe, The Middle East, & . This item can be shipped worldwide.