Dyalog Elastic Bands are perfect for stylishly securing and adding additional Dyalog Insert Books, Pocket Inserts, and more in your Dyalog system. The colorful elastic bands coordinate with all Dyalog Covers and keep you organized. The four elastics are sized to fit the Dyalog program. Package includes four colors: bubblegum pink, calypso teal, crushed grape and black marble.