Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number EIP 545B OPT WB94 found under Meter Electrical Frequency by Phase Matrixinc. The National Stock Number assigned to this part is 6625015492868, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like EIP 545B OPT WB94.