The black gold septa, also known as sticky nickels, are used to seal the needle puncture area when performing modified atmosphere packaging (MAP) headspace gas sample testing. Use of septa prevents air from entering the headspace of the package while performing a test. The septa is manufactured from closed cell Nitrile with an acylic adhesive backing specifically designed for needle insertion and removal that is unique to the headspace gas analysis process of MAP food packaging. A case of 15 mm septa includes 10 packs of 975 pieces per case