High-quality, extremely durable binder made of polypropylene, resistant to dirt and moisture. The patented 4-ring mechanism (2-step technology) allows for quick opening and swapping of sheets. The double guidance of the mechanism bars and the locking feature when closing ensure safety and stability. The pages lie seamlessly opposite each other, similar to a display book. The Ergogrip binders come with a pocket on the front cover and a spine label in a transparent pocket. The practical grip recesses on the back make it easy to take the binder off the shelf. A4 format, spine width 56 mm, filling height 50 mm. Dimensions: 31.3 x 5.6 x 28.0 cm. Weight 580 g. Main features Functions Product color Black Material Polypropylene (PP) Format A4 Weight & Dimensions Width 280 mm Depth 56 mm Height 313 mm Packaging content Quantity 1.