Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HA1-11W found under Insulation Sleeving by Markel Corp. The National Stock Number assigned to this part is 5970009895371, and the Federal Supply Class is 5970 Electrical Insulators And Insulating Materials. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like HA1-11W.