DOT-SP-8249 in accordance with 49 CFR 178.601(2) Variation (2). The outer pack bears 4GV markings. For shipping solids. The packaging consists of the following components along with complete instructions for assembly: interior zippered bag interior 275# corrugated single-walled carton exterior zippered bag exterior 350# corrugated double-walled carton Package #2A comes complete as a single-pack set. Exterior cartons are available for shipping two or four single-packs together. When shipping liquids, pyrophoric solids or dangerous when wet materials, package #2(liquid pack) must be used.