Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number B05-20204 found under Transformer Pulse by Serono Baker Diagnostics Inc. The National Stock Number assigned to this part is 5950011227161, and the Federal Supply Class is 5950 Coils And Transformers. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like B05-20204.