Package: You will receive 6 pack mason jar vacuum lids(not including pump), these lids are especially for the people who need extra vacuum lids for their mason jar vacuum sealer kit. Now you can use them for more storage needs..Easy to Use: Compatible with AIEVE mason jar vacuum sealer. Tighten the split-type jar vacuum lids and align the air pump at the airlock/suction hole on the lids, press the air pump firmly on the lid and turn on the air pump for at least 20 seconds..Practical Design: With the classical split-type lid design which including airtight sealing lids and bands, the central airlock hole can easy pump out the air and prevent air from entering. Wide mouth size can fit for Mason Jar Ball, Kerr Canning..Material: The jar sealer lids are made of high quality stainless steel, BPA-free, food grade, anti-rust and reusable. Safe to use for preserve dry, moist, soft food modes and making fermented food..Easy to Clean: The vacuum sealer lids are very easy to clean by hand and dishwasher. Please dry them after washing to prolong the life of the lids.