The Ultimate Pen Storage - A versatile storage solution for all pens including specialised colouring systems. Modular system which can be customised to your personal space, Three different ways to build - horizontally, vertically or angled, Will accommodate most pens including specialist pens, Portable and lightweight, Stylish design, Made from 100% recycled plastic. Ever since we first launched the Spectrum Noir pens weve been working on ways to best store them. Due to the nature of alcohol pens, they need to be stored horizontally to ensure even ink flow to both ends. With this in mind, we developed a versatile storage solution that fits not only Spectrum Noir pens, but also all pens up to 17mm (5/8) in diameter, including specialised colouring systems. This modular system can be customised to your personal craft or work space as it can be built up in three different ways - horizontally, vertically or angled. Each unit will hold twelve pens - the perfect size to hold two full packs of colour-themed Spectrum Noir pens - and they can be stacked as high or as wide as you require. You will receive six units in this box - that's enough storage for 72 pens! Suitable for pens up to 17mm in diameter. Each tray measures 13.5cm x 24cm.