Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 049-9449 PARTS KIT A found under Parts Kit Ecg Simulator by Biotek Instruments Inc. The National Stock Number assigned to this part is 6545012671453, 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 049-9449 PARTS KIT A.