In this 9 Pack, you will receive each size and shape on each ear tip available for the N-ear 360. It's a great way to zero in on your size and prefered ear tip. Premium ear tips with different forms, functions, and sizes: Open Ear Tips - Full Ambiance - Full Situational Awareness Tulip Ear Tips- Medium Ambiance - Medium Situational Awareness Double Flange Ear Tips - Low Ambiance - More Radio Sound Less Situational Awareness