"The Richco® Snap Bushing is built to protect wires and cable and absorb shock and vibration. The Snap Bushing wings at the top wire inlet adjust to accept various diameters and shapes. Installs on any panel from .031 to .118 inch thickness. Manufactured with nylon 6/6 material, RMS-01, color Black."... Click here for more info on Snap Bushing Hole Diameter 1.10 Qty 25.