Sinbo DZ-280/2SD 11" Home Vacuum Sealer w/ 4mm Seal & Retractable Nozzle from ABC Office Single 4mm seal width | Self-contained unit; not external compressor needed Impulse sealing system; no warm-up time needed | Retractable nozzle | Controllable heat timer Controlled heat-sealer timer and overheat warning indicator Energy efficient, compact, and portable in size Includes free tech support when purchased from ABC Office