Describe: new Material: Foam Col: see picture Specifications: 20mm, 23mm, 25mm, 28mm, 32mm, 38mm, 40mm, 51mm, 55mm, 63mm, 70mm, 82mm Package Includes:200Pcs or set Pressure Sensitive Seal Cap Suitable f pressure sensitive foam seals, cap seals. Made of foam material, soft, non-toxic, odless, good sealing perfmance. It can not only increase the output value of the enterprise, but also extend the stage function of the product. It is widely used in the sealed packaging of medicine, food, health products, cosmetics some chemical products. advantage: 1. Help maintain the freshness of the product. 2. Help prevent oil fluid leakage. 3. Helps prevent product contamination. 4. Help verify product integrity. How to Use: Place the liner onto the opening of the bottle or jar. (Make sure the rim is dry, clean smooth. ) The one side with wd should be the upper side (see picture shown). Twist your cap onto the bottle. Leave in place f 30 minutes. This gives the adhesive time to release leaving the liner attached to the rim. You will see the liner sealed closely onto the rim of the bottle or jar opening after you take off the outside cap 30 mins later. Note: 1. Please allow 5-10mm differences due to manual measurement, thanks. 2. The actual col of the product may be slightly different from the picture, the website is caused by various facts such as the brightness of the monit the brightness of the light.