Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 13900019 found under Base Plate Ear Cup by Dalloz Safety. The National Stock Number assigned to this part is 5965011264169, and the Federal Supply Class is 5965 Headsets Handsets Microphones And Speakers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 13900019.