Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 117-3902 PARTS KIT-B1 found under Parts Kit Refrigerator Mechanical Blood by Kendro Laboratory Products Lp. The National Stock Number assigned to this part is 6545012726087, 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 117-3902 PARTS KIT-B1.