Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number STYLE 192-D PRINTED found under Envelope Mailing by Bowers Envelope Company Inc. The National Stock Number assigned to this part is 7530011225150, 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 STYLE 192-D PRINTED.