Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 105B729-1 found under Seat Valve by General Electric Inc. The National Stock Number assigned to this part is 4820009868801, and the Federal Supply Class is 4820 Valves Nonpowered. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 105B729-1.