Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 400-174 ITEM 12 found under Disk Absorbent by Biomarine Ntron Incorporated. The National Stock Number assigned to this part is 4220010837996, and the Federal Supply Class is 4220 Marine Lifesaving And Diving Equipment. Our website is owned and operated by ASAP Semiconductor, a leading distributor of aviation and aerospace part numbers like 400-174 ITEM 12.