The Understanding GERD chart presents a detailed overview of the symptoms and causes of Gastroesophageal Reflux Disease (GERD). Several views show normal esophagus and stomach anatomy, as well as GERD, esophagitis and Barrett?s esophagus. Heavy gauge 3ml lamination with sealed edges and two metal eyelets for hanging makes chart highly durable. Write-on/wipe-off with dry erase marker (not included).