Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 163-3772 PARTS KIT found under Parts Kit Diluter Wbc by Beckman Coulter Inc. The National Stock Number assigned to this part is 6545012917545, 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 163-3772 PARTS KIT.