Office Depot business envelopes 2018164. Safe & secure envelopes. Seal: self-seal. Paper weight: 90 g/m_. Format: DL. Cardboard back: no. Envelope type: plain. Hot melt: no. Material: paper. Printed interior: yes. Stamp: yes. Height: 110 mm. Width: 220 mm. Colour: white. Quantity: 500 pieces.