Mercure 720 Venus Auto Start/Stop Sealer Regular Tray 11.5" - for Stacked Envelopes only, Up to 300 envelopes per minute with variable speed, 3.50" to 9.754" deep - 11.5" length, Eliminates manual wetting, flap folding and sealing of envelopes, Seals all usual envelopes; nested and un-nested, Automatically starts & stops for ease of use, Portable, desktop unit is clean and quiet for use in any office or department, 36.25" L x 19.63" W x 14.13" H Dimensions, Seals most flap shapes including pointed and rounded from 1.38" up to 338" flaps requires optional large envelope sealing kit, Increases productivity and saves wear and tear on your equipment now being used for just sealing, Reliable electronic piece counter with re-settable 6-digits - optional.