Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E41 SERIES 3 REPAIR KIT found under Parts Kit Valve by Imi Cash Valve Inc. The National Stock Number assigned to this part is 4820013773970, 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 E41 SERIES 3 REPAIR KIT.