ITEM NAME:5Pcs Waterless Food Grade Silicone Fermentation Airlock Lids Fermenting Covers Description 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. High quality store for you! 5Pcs Waterless Food Grade Silicone Fermentation Airlock Lids Fermenting Covers.1 Set of 5pcs, red, blue, green, white, purple for each, attached steel ring. Quantity: 5Pcs. Food grade silicone, safe and non-toxic. We'd like to settle any problem in a friendly manner. We want to make sure you are happy with our item.