Staedtler Drawing Case Used only once, in excellent condition. Features a very fine 14-step pitch, allowing for precise adjustment to perfectly fit the drawing size. [Size] Inner diameter: 590mm (shortest) ~ 970mm (longest) x φ60mm Uniquely dark gray color and stylish, simple design. The ends are 12-sided, designed to prevent tipping when leaned against something. This very lightweight and durable drawing case can store up to A0 size drawings. Compact design for easy carrying. Thank you for looking.