Ring binder mechanisms / ring mechanisms with 2, 3, 4, 6, 9, 17, 23, 27, 30 rings in round / straight d / slant d / q shapes. And 123, 133, 216, 264, 280, 285, 290 mm length.
Material: Natural rattan (sometimes coated for durability) Handwoven or machine-made Size: Inner Diameter: 3.5 to 4.5 cm (approx. 1.4 to 1.8 inches) Outer Diameter: 5 to 7 cm (approx. 2 to 2.8 inches) Height: 3 to 4 cm (approx. 1.2 to 1.6 inches) Color: Natural rattan color (light tan to dark brown) Sometimes painted or stained in various colors