Power-Tec 92423 Polypropylene (PP) Plastic Welding Rods 6 Piece Features and Benefits: Black plastic rods for use in a plastic repair on such items as bumpers, headlight housings, inner wing liners, splash shields, fan shrouds, petrol tanks, interior and under bonnet trims. Ideal for use with the Power-TEC Plastic Repair Kit. Polypropylene (PP). Size: 4mm diameter x 170mm. Colour: black. For use on PP material (Polypropylene). Typical applications include: bumpers, headlight housings, inner wing liners, splash shields, fan shrouds, petrol tanks, interior & under bonnet trim. For use with the Power-TEC plastic welding kit, please see Part No. 92418.