These transparent storage boxes are made from polypropylene, making them sturdy and hard-wearing. They come supplied with lids too help secure the contents easily. There's no need to label them as the contents can be seen through the box. The 35 litres and 64 litres boxes have an internal lip for supporting A4 suspension files. Stackable with or without the lids, saving on storage space. External Height: 15.5cm. External Length: 39.5cm. External Width: 25.5cm. Internal Height: 14cm. Internal Length: 33.5cm. Internal Width: 21cm.