Thank you for selecting Aerospace Aviation360 as your go-to distributor of part number 500 BLANK 1411 VELLUM found under Paper Tracing by Calcomp Inc. The National Stock Number assigned to this part is 7530010739370, 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 500 BLANK 1411 VELLUM.