Material: Made of polypropylene;No BPA,no chemical,durable,safe and rust-proof Size: Outer diameter:70 mm,fits regular-mouth and wide-mouth mason jars and other jars with 70 mm openings size Package: 8 Pieces plastic mason jar lids in 8 Colors,including bright red,yellow,sky blue,ruby blue,white,orange,green and pink,great for color coding preservation,adding fun and vivid colors to family Advantages: The product has been upgraded with an integrated silicone sealing ring, resulting in enhanced sealing performance. It is less susceptible to rust during regular use, can be safely cleaned in the dishwasher, and is easy to clean. Widely use: Suitable for storing all types of stuff,not only for storing fruits,jams,cookies and colorful candies,but also suitable for storing soft drinks,tea,coffee,storing nails,screws and other small things