Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B02561 found under Hose Air Duct by Gse Holdings Inc. The National Stock Number assigned to this part is 4720014570339, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B02561.