50 envelopes made of sturdy cardboard, A3 C3, 320 x 430 mm, brown case with fixed pocket for sending envelopes without folds, cardboard envelope, reinforced back, adhesive strips : Amazon.nl: Stationery & Office Supplies
Monsterzak A3/ C3 Bruin
Kartonnen Enveloppen 320 x 455 mm Wit | Blok Packaging