SPECS Materials: Glass or Ceramic Size: Glass 8mm/Ceramic 9.5mm Quantity: 20 pack Also Known As Honeycomb Pipe Screens Honeycomb Disk Screens Description This is the Honeycomb Flower Bowl Pipe Screen! These screens were designed to act as a barrier between your herbs and your bong or your herbs and your dry pipe.  Honeycomb Pipe Screens help keep your pipe and bong clean for longer and keep you from inhaling your herbs before they are properly burned.  After combustion, these screens also cut down on the amount of ash sucked into your piece upon inhaling, ultimately keeping your water and smoke cleaner!  We offer these screens in a 20-pack of two materials, borosilicate glass, and ceramic to fit any of your needs!  Recommendation What are  Inserts? - Get the most out of your accessories by reading more here!  FAQs What Is The Difference Between The Ceramic And The Glass Screens?  Ceramics is a higher quality material than borosilicate glass. Both can be damaged if not handled properly but ceramic has a little more durability. Glass is transparent and clear, whereas ceramic is white.