Enviro-boxes are heavy duty boxes made from reinforced single wall cardboard. Internal dimensions: 305 x 229 x 229 mm (12 x 9 x 9 inches). Pack Of 20. These cartons have the added advantage of being multiscored at 152mm. This allows you to reduce the depth of your carton to a pre-scored dimension, by cutting down the existing slots (between the flaps) and folding along the pre-scored crease. Our enviro-boxes are environmentally friendly, strong cardboard boxes that are made from reinforced single wall cardboard. Enviro-boxes offer increased strength over most double wall boxes, the materials used are 7% lighter (meaning lower transport costs) and the process of manufacturing Enviro-boxes results in a 30% saving in CO2 emissions. Supplied flat packed - make them up by taping the flaps.