The Ultimate Pen Storage is a versatile storage solution for all pens including specialised colouring systems.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 in diameter, including specialised colouring systems.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!Features & Benefits 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 Specification Tray: 13.5cm x 24cm