Color: Black, set of 3 Outer diameter: approx. 2.4cm Inner diameter: approx. 1.6cm Thickness: approx. 3mm *Slight variations may occur* Small, round carabiner Convenient for attaching mascot keychains, acrylic stands, rubber straps, etc. to the hardware of backpacks, bags, etc. Compact size, not too large Available in a total of 16 colors. We have stock, so we offer discounts for multiple purchases. Please feel free to inquire. a-23 *It may be difficult to adjust the lighting during photography, and the color of the actual product delivered may differ from the photos depending on the viewing environment and monitor resolution. There may be minor scratches etc. from the manufacturing process. Please understand this beforehand.