These practical wet-glue envelopes are perfect for inserting machines. Print the envelopes with your logo, company slogan or in your corporate colours, so your customers know who the letter is from before they even open it. The best part: you can even customise the inside. The envelopes are available with an address window on the left, on the right or without a window – just as you like. wet-glue and suitable for machine inserting lettershop format C6/5, opening on the long side (22.9 x 11.4 cm) C5 format, opening on the short side (22.9 x 16.2 cm) C4 format, opening on the long side (22.9 x 32.4 cm) printable on front and back, also available unprinted inside with number pattern, solid grey or white, or custom print 100 g, 90 g or 75 g white offset 80 g recycled or natural paper (C5 and lettershop format only) optionally FSC® certified without window, window left or window right usable for at least one year if stored correctly available from 10 pieces Note: depending on configuration, with FSC® or PEFC certification (licence codes: FSC-C146549 / PEFC/04-31-3130).