1.material:UL standard Nylon PA66, 2.flame class is 94V-2, 3.acidproof,alkaliproof,durability and hard to aging Put the electrical wire or cable inside the bushing,and use screw tighten it ,then it can fix on the mounting ,which make it aesthetic tidiness,and also not get loose.Normal wiring fix usedOEM price ,fast delivery,professional service