... /white 5,Certifications:CE,UL,ROHS SMTI20 Industrical trunking antique trunk 1,Tracking service2,Payment have L/C ... Material is pure pvc4,ISO,IEC,CE,GB5,Different size,color and packing 6.Great impact-resistance,can ... use, long service life.4. My factory's industrial trunking insulation, high temperature, strong and has a unique ... materia than any factory.But the different size have different price.