Quality Park DuPont Tyvek Expansion Envelopes, "First Class", 10"W x 13"H, White, 100/Pack

P dupont tyvek exp. envelopes, open end, 100/ctn, 10 x 13 x 1-1/2, first class /pdupont tyvek® expansion envelopes • superior protection for bulky items • use instead of cartons or boxes • expands on sides to fit binders, books, reports open end, regular weight 100 envelopes per carton. first class green diamond border 10 x 13 x 1-1/2.