These extra strong heavy duty box liners are made from 200 micron / 800 gauge polythene and sized to line our 4G and 4GV UN certified cardboard boxes. That heavy duty plastic means they comply with UN/IATA requirements for the transportation of hazardous liquids within the EU. The size of a side gusseted polythene box liner is always expressed as "x" wide opening to "y" wide times the length. For example, if a bag is stated as 100mm x 150mm x 200mm this means it is 100mm wide when flat, opening to 150mm including the gusset, with a bag length of 200mm.
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