Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number E28-40-1-2INPSTCTB found under Tubing Nonmetallic by Ernst Flow Industries Inc. The National Stock Number assigned to this part is 4720001356294, 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 E28-40-1-2INPSTCTB.