Specification Color:White Material:PS and Foam; Size:2 sizes for your choosing 2.7cm or 3.5cm; Package Including 100PCS Features Pressure Sensitive lines are designed to be used as an inner seal to seal solid products.These liners don’t recommended for watery liquids like juices , especially essential oils.Can preserve freshness of product. Sealing inserts provide an actual seal for various jars or bottles. They are adhesive to GLASS and PLASTIC jars, and round containers with metal or plastic caps and closures. Please allow 1-3mm error due to manual measurement and make sure you do not mind before ordering. How to use Just place the sealers in the bottom of the bottle cap (The side with words facing the bottom of the cap) and tighten the cap. Removing the cap after about 120 minutes, the sealing material has been firmly attached to the bottle mouth to achieve the purpose of sealing, the degree of adhesion depends on the ambient temperature, the pressure on the cap and other reasons. Warming Note Please no hesitate to contact us for any question about our products,we will response within 24 hoursPressure Sensitive lines are designed to be used as an inner seal to seal solid products;These liners are NOT recommended for watery liquids like juices & especially essential oils. These Pressure Sensitive Lines are designed to be used as an inner seal to seal solid products, such as dry foodswork with thick liquids such as creams and sauces. Its tasteless features suitable for glass bottles, metal bottles, plastic bottles, food and cosmetics, bottles of solid food products for the dry domain. Please kindly noted 2.7cm suitable for 3g,5g packing bottle jars.3.5cm suitable for 15g,20g packing bottle jars.Please confirm before order. Packakge Including: 100 Pack Foam Seals for Hidden Sunscreen / Shampoo Flasks Bottles.Made of Polystyrene Foam for Pressure Sensitive Seal Liners.