Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number HP1-077-2500 found under Duplex Hose Rubber by Katadyn North America Inc. The National Stock Number assigned to this part is 4720014623241, 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 HP1-077-2500.