The boards are made of natural wood and provide a more pleasant reading. The pillars and base are made of high-quality aluminum alloy. Anodized coating provides long-lasting rust and protection. With a 360?? swivel base, it is the tool for sharing ideas or presenting cases. Multi-angle and height adjustable bookshelf elevates books to fit your eye level, promotes correct posture for better spine health, eliminates strain on eyes, neck, back and shoulders Versatile cookbook holder for books, tablets, magazines, drawings, sheet music, tablature, of different sizes and styles. Great for students, teachers, and long-time . Material: Wood+aluminum alloy colour: Wood+silver Package Contents: 2 x Adjustable Book Holder Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.