constructed from strong 275#/ect-44 single wall kraft corrugated holds 4 – 1 gallon f-style cans un number: 4g/y50.7/s use these containers as refills for foam shipper kits cartons are printed with mandatory warning information “this side up” arrows are printed on 2 sides of the carton cartons ship and store flat to save space in accordance with cfr 49 178 601b, shipper is responsible for choosing the correct packaging for product and for final closure. consult appropriate regulations.