Engineering grade retro-reflective sheeting with four series, respectively, um5100, um5200, um7200 and um7200h is accordant with the technical requirements of retro-reflective sheeting with class four in the national standard gb/t18833-2002 retro-reflective sheeting for road traffic signs and mainly used for traffic signs, construction signs and outline signs of highways with class 1-4, urban roads, and also can used to make the traffic cones, crash barriers barrels, safety islands, etc. I. Product features Um5100 with high tensile strength is especially suitable for mechanical foils. It has the superior solvent resistance and is easy to clean. Um5200 with long durability, can be used for screen printings. Um7200 with long durability, can be used for screen printings.