Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ART 128 1-1 4IN found under Valve Ball by Lips Proptech B V. The National Stock Number assigned to this part is 4820171086435, 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 ART 128 1-1 4IN.