The PKCS033KHS is a black smooth non child resistant certified cap with a neck size of 33MM. This cap has a FS5-8 foam liner (FS 5-8 is a heat induction foil inner seal which will provide a tamper-evident bond). This liner has a backing of .020 and has "sealed for your protection" in red printed on the top of the liner. This is a universal liner and works with both glass and plastic bottles. This is recommended for Liquids. Great for dry products, fruit juices, milk, glass cleaner, peroxide, and spices. It will seal to most containers. Not recommended for products containing oil.