ITEM NAME:Silicone Airlock Fermentation Lids 5 Pcs Wide Mouth Jars Fermenting Cover Descriptio n Description: Thermoforming, durable for use Food grade silicone, safe and non-toxic Strong adsorption and good sealing 1 Set of 5pcs, red, blue, green, white, purple for each, attached steel ring Specifications: Material: Silicone + Metal ring Type: Fermentation lids Color: Red, Blue, Green, White, Purple Quantity: 5Pcs Package Included: 5 x Waterless Silicone Fermentation Airlock Lids Note: 1.Due to the manual measurement and different measurement methods, the actual size could be slightly different. 2.Please be reminded that due to lighting effects and monitor's brightness/contrast settings etc, the color tone of the website's photo and the actual item could be slightly different. We offer you what you need! Silicone Airlock Fermentation Lids 5 Pcs Wide Mouth Jars Fermenting Cover.Food grade silicone, safe and non-toxic. 1 Set of 5pcs, red, blue, green, white, purple for each, attached steel ring. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.