Screw locking type in line with industrial design standards, the shell locking to screw + nut locking Industrial design tail rubber sleeve to protect wire transiting, both beautiful and protect wire from damage Resistant to plugging and unplugging, double-layer process, plug pulling and plugging not loosen Industrial design standards and friendly environmental PVC shell, pressure resistance, oil resistance Flexible tail pipe: soft and hard moderate black wire tube is conducive to the protections in use, the pull of wire to play a protective role