●Complete Set: 2 glass jars, 2 airtight plastic lids, 1 sponge brush, 2 gold mats, 2 rubber bands to fastenand, 4 muslin cloths that is breathable but keeps out contaminants or bugs. ●High Quality Glass: Each glass jar is made of high quality soda lime glass that resists cracking and breaking. Dishwasher safe and microwave safe without the lid. ●Airtight & Leakproof Plastic Lid: Strong and corrosion-resistant lids that fit perfectly into the mouth of the jars, with a sealing device to make it even more sealed and leakproof. ●Multi-Purpose: Fermenting foods(such as kombucha, kefir, sauerkraut, kimchi and much more) storaging and canning (such as rice, oatmeal, flour, pasta, fruits and vegetables and much more) ●If youre not completely satisfied simply let us know and we will offer a prompt refund or replacement, no questions asked