Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 6B72 found under Buffing Compound by Elf Machine Works Inc. The National Stock Number assigned to this part is 5350000453490, and the Federal Supply Class is 5350 Abrasive Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 6B72.