Here you will find Black Phenolic Cone Lined caps ranging in size from 18/400 to 38/400. The cone lined plastic caps provide a wedge type seal that not only seals across the top of the container, it also seals across the inside diameter. This liner is stress crack resistant and offers superior torque retention and excellent sealing characteristics. This liner paired with phenolic plastic caps is commonly used for liquid products and should be tested first to make sure leaking does not occur. These caps are offered at wholesale pricing in bulk for the best discounts.