Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 2691 found under Filter Element Intake Air Cleane by Puritan Bennett Corp Of California. The National Stock Number assigned to this part is 4310012481040, and the Federal Supply Class is 4310 Compressors And Vacuum Pumps. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 2691.