Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number MC-903 17IN OD X12 ID X 13L found under Tubing Nonmetallic by Quadrant Epp Usa Inc. The National Stock Number assigned to this part is 4720015403853, 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 MC-903 17IN OD X12 ID X 13L.