Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number AZ0STIK found under Test Strips And Color Chart Blood Urea Nitrogen by Bayer Corp. The National Stock Number assigned to this part is 6550000372028, 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 AZ0STIK.