Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number D2664MARKE3AX found under Trolley Hoist by Guardian Filter Co. The National Stock Number assigned to this part is 3950003719638, and the Federal Supply Class is 3950 Winches Hoists Cranes And Derricks. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like D2664MARKE3AX.