Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MA81757-18-1 found under Cover Battery Charger by Marvel Aero International Inc. The National Stock Number assigned to this part is 6130015803678, and the Federal Supply Class is 6130 Converters Electrical Non Rotating. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like MA81757-18-1.