Hazardous materials over pack packaging for shipping plastic five-gallon pails (Drums must meet D.O.T./UN hazardous shipping regulations.). Approved by the National Safe Transit Committee and conforms to UPS Hazardous Materials regulations. They are tight-fitting, regular slotted corrugated cartons with tray pads and are marked: Inner Packages Comply with Prescribed Specifications in accordance with 49 CFR (HM 181) IATA/ICAO. (Drums must meet D.O.T./UN hazardous shipping regulations.) This modified pack, for plastic pails, include a 275# Test Corrugated Cardboard Carton and two double-wall, 275# test corrugated tray pads.