Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 54A-POLYCRBNT.75X18INLG found under Tubingnonmetallic by Essex Brass Corporation. The National Stock Number assigned to this part is 4720011937695, 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 54A-POLYCRBNT.75X18INLG.