[WIDE APPLICATION]Our canning lids size are perfectly suitable for mason, Ball, Kerr canning jars regular mouth canning jars [SPECIFICATION]The diameter of leak-proof high pressure canning lids are 70mm /2.75 inch, Each box, 50 counts Regular Mouth jar Lids with silver color. Please make sure the size before purchase [DURABLE AND SAFE]Made of premium tinplate, Free, no rusting or fading, safe and harmless to your food, ensures durability and reliability, can withstand high pressure. No bending, corroding or cracking. Lids are for one-time use only [EXCELLENT SEALING PERFORMANCE]Have good leak-proof and secure effects, inside with 1mm thickness sealed rubber rings, ensures mason canning jar lids have good airtightness performance, maintain cans inside food and clean condition for long time, make cans perfect for storage colour: silver Material: tinplate Package Contents: 50 x canning lids Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.