Functionality, availability, selection – Elco offers the most comprehensive selection of business envelopes with over 300 different types available ex stock – if urgent within 24 hours.\n\nThe brand name here is programme. ELCO classic is an elegant and reliable envelope with a subtle grey internal print.\n\nTop quality bright white paper\n- Grey internal print made of 100% watercolor\n- Window made of transparent film\n- Available with an Optifix peel and seal flap and Optimail gummed flap