Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number ZOSYN 3.375 GRAM VIAL found under Piperacillin And Ta by Pfizer Inc. The National Stock Number assigned to this part is 6505015412275, 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 ZOSYN 3.375 GRAM VIAL.