Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number TYPE71 12.50X6.50X.88 found under Filter Air Electrostatic by Research Products Corp. The National Stock Number assigned to this part is 4460001984853, and the Federal Supply Class is . Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like TYPE71 12.50X6.50X.88.