Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number WBEI-00-000-0343 found under Valve Assembly Ball by Willbros Engineers Inc. The National Stock Number assigned to this part is 4820012884636, 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 WBEI-00-000-0343.