3mm welding rod 1.anti-microbial,stain resistance,environmental friendly,non-toxic 2.diameter:3mm,4mm ,5mm 3mm ... ,4.5mm or 5mm.100m/coil Featuresanti-microbial,stain resistance,environmental friendly,non-toxic, water resistance Colour a wide range of colour to ... the penetration of dirt and moisture.It provides good adhension ,stain resistance and easy to be trimmed off .