Keep your food fresh longer by pulling air out of the mason jars and preserving the freshness of your sauces mustards jams grains nuts and more. Instructions: 1. Choose the correct size sealing kit and jar lid. Place the lid on the top of the Mason jar. 2. Push the jar sealer down firmly until it covers the entire rim of the jar. 3. Manual Pump vs. Sealing Machine Option A: Use with a manual vacuum pump. There are two ways to use a hand pump: Method 1: Align the hole of the manual vacuum pump with the hole of the jar sealer and keep them tightly fitted. After 5?20 pumps you will feel it is difficult to pump; the sealing process is complete Method 2: Attach the wider hose to the pump opening. On the other end attach the 1st adaptor prong side to the hose. Attach the narrower hose to that adaptor opening and attach the second adaptor opening to the other end of the narrow hose. Attach the 2nd adaptor s prong side into the hole of the jar sealer and pump for 10-15 times. Each adaptor and hose must be f