It is a nylon cord bushing excellent in impact resistance that protects the surface of penetrating holes and penetrations (cable or pipe) from damage such as scratches or abrasions. The nozzle and nut are easy to fit and fix with a only screwing in (one-touch-screw). It can be used in a wide range of applications, such as penetrating holes in boards and concrete walls, equipment around machinery or OA equipment. It is made of flame-retardant (UL94 V-2) nylon resin which possesses heat resistance and tracking resistance and contains no harmful substances.