These black smooth polypropylene caps include PS22 liners that are printed with the words "SEALED for YOUR PROTECTION". The PS22 liner is a pressure sensitive liner that adheres to the container once the plastic caps are securely screwed on. When the plastic caps are removed, the seal remains on the container and can be removed by being peeled off. As always, be sure to test all cap and container options with your products for proper compatibility. Here you will find a selection ranging in size from 33mm to 89mm for pairing with containers that have matching neck finishes. These caps are offered at wholesale pricing in bulk for the best discounts.