Pen & Pencil Box Stak stationery storage unit including 5 plastic pen and pencil storage boxes. The Pen & Pencil Box Stak storage unit is a great value space-saving craft storage solution and an easy way to stow your WestonBoxes Pen & Pencil Storage Boxes. This pack includes a Box Stak storage rack, 5 Pen & Pencil storage boxes and a set of 5 box handles which clip to the front of the plastic boxes making them easy to pull out of the unit. The Stak design enables easy access to all boxes allowing for optimal organisation of pens, pencils, brushes, office accessories and stationery. .