[FIT FOR] - 2-1/8' (53mm) hole diameter. [TOTAL SIZE] - 2.40' (61mm) max diameter, 0.51' (13mm) high. [MATERIAL] - Made of zinc alloy, electroplating finish which makes their appearance more elegant, anti-corrosion, good wear resistance. [EASY INSTALLATION] - Simply drill or cut a hole through the surface and insert the grommet into the hole. [WIDE USE] - Organize wires and cables on office equipment, computer components, entertainment systems effectively.