Fingertip pressure snap-locks into its mounting hole. Absorbs vibration and insulates cables, tubing, or shafts with limiting internal clearance. Widely used in electrified railway and power grid wire insulation protection, cable snap bushing insulated protection reliable. Note: Due to manual measurement, the size may have an error of +/- 1-2mm. for Panel Thickness: 1.8mm Overall Size: 11 x 29 mm / 0.43" x 1.14" (Height*Max Diameter) Mounting Outer Diameter: 25 mm / 0.98" Material: PA66 Color: Black Package Content: 20 (+/-2) x Panel Hole Cover