Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 055-00-01R01 found under Facepiece Breathing Equipment by 3M Company. The National Stock Number assigned to this part is 4240013233418, and the Federal Supply Class is 4240 Safety And Rescue Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 055-00-01R01.