Suitable for mason jarsjar sealer kit draws air out of the mason jar, creating a vacuum seal to keep food fresh. Jar sealers are compatible with regular and wide mouth mason jars. Suitable for vacuum sealer machinesJar vacuum sealer kit is compatible with foodsaver and other brand of vacuum sealer machines. (But not compatible with the following foodsaver models: FFS005-033, FM1100, FM2000, FM2100, FM2500, FM2900, FM4800, FM4900, FM5800, US220, V50160, VS0100, VS0150, VS0160, VS1120, VS1130.) Handly Seal Mason JarsYou can manually seal the mason jars by the manual vacuum pump. The manual vacuum pump is like a mobile vacuum sealer, you can take it with you when you travel or have a picnic. (Please do not connect the hose to the manual vacuum pump, which greatly reduces sealing and shortens the life of the pump.) Attach multifunctional bottle openerThe bottle opener can open the lids more easier and make the lids reusable. It can also be used to open other bottles. We provideJar Sealer*2, Accessory Hose, Adapter Hose, Manual Vacuum Pump, Mason Jar Lids*4, Bottle Opener, User Guide. We also provide 24-hour customer service, if you have any questions, please contact us in time. Product Description The Manual Vacuum Pump Also Perfectly Seals Mason Jars Three Ways to Seal Mason Jars Easily and Quickly NOTE Not compatible with the following foodsaver models: FFS005-033, FM1100, FM2000, FM2100, FM2500, FM2900, FM4800, FM4900, FM5800, US220, V50160, VS0100, VS0150, VS0160, VS1120, VS1130.