This is the DMB-150CST Teflon Coated Heat Sealer. It will seal a 5 gallon bag in 30 seconds or less (after a little practice) with a perfect 9/16th" seal. On our bags, this allows easy access to a tear tab which none of our competitors offer.
This sealer has a crack-resistant housing, 2 heat settings, and a teflon coating that allows the sealing of many different media (including all bags on this site). This is the same sealer that many other sites sell for $119 and up to $159.