The Spectrum Noir Marker Storage Trays are made of 100 percent recycled, black plastic. This modular system can be customized to your personal space! There are three different ways to build: horizontally, vertically or angled. This storage tray will accommodate most markers and pens, including specialist markers. This package contains one Noir marker storage with six trays (holds seventy-two markers up to 0.625 inch in diameter). Each rack measures: 5.3 x 9.5 inches.