Specification: Material: Rubber Color:Black Inner Diameter: 1.18"/ 30mm Outer Diameter: 1.73"/ 44mm Thickness: 0.45"/ 11.5mm Package Includes: 15 x Rubber Grommets Warm Tips: 1.The color might exist slightly difference due to different displays. 2.Please allow 1-3mm error due to manual measurement.