Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 221081-1 found under Guard Hose Tubing by Valcom Manufacturing Group Inc. The National Stock Number assigned to this part is 4720219140508, and the Federal Supply Class is 4720 Hose And Flexible Tubing. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 221081-1.