This is an OEM Sure Hook Hanging Pocket designed for legal-size documents. It features SureHook Technology with built-in tension springs that ensure folders stay on track and slide smoothly. The full-height, 3-1/2" expandable gussets prevent the folder from getting caught on folder rails. Constructed with polylaminate reinforced tops, this product contains 10% post-consumer fiber and is acid-free, making it an environmentally friendly choice. Each pack contains 4 hanging pockets in standard green.