Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TFE SW SIZE11NAT found under Insulation Sleeving Electrical by Markel Corp. The National Stock Number assigned to this part is 5970000797746, 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 TFE SW SIZE11NAT.