... -casting zinc alloy;this product has a pre-assembly,recycling,free expansion,safe and effective,adaptability strong,light weight,portable,easy to ... criminal or terrorist's vehicle.It si in high quality and long lifespan. LZJ-10/8 - 8 m 10 m ... rigid die-casting zinc alloy; this product is safe and effective pre-assembly, recycling, free expansion, road coverage, adaptability, light weight, portable ...