Mason Jar Sealing Feature?
Only those vacuum sealers featuring a specialized vacuum outlet port can be used for pressure-sealing jars. Even so, you’ll need to connect a few extra attachments to get the job done. Normally, these attachments come bundled with the vac-sealer, but if they aren’t, nothing to worry as you can always purchase them separately.
First off, you will require an air extraction tube. This is a narrow plastic hose that connects to the vacuum outlet of your machine. The other end of the hose connects to a top-hat shaped, plastic attachment that will fit on top of a mason jar. This component is available in two sizes i.e. regular or wide mouthed, so take stock of what kind of mason jars you have at home and buy the attachment accordingly.