Our UN4G Five gallon bucket packaging systems are designed and certified to ship certain hazardous liquids or solids via all modes of transportation excluding Air. All components of the combination package must be used (no substitutions) in order to comply with UN4G testing. To Assemble System 1494H17, Components Needed Include: One - 1434H01 UN Marked Carton. One - 1100T09 Bucket, One - 63RFS Rieke Spout Cap. Meet compliance with Hazardous Materials Shipping Labels.