Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number UPC 74300004143 found under Pyrethrins And Piperonyl Butoxid by Bayer Corp. The National Stock Number assigned to this part is 6505016751776, 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 UPC 74300004143.