1) The crowd barrier is used to control the crowed for pertection when necessary.The material is aluminum 6061 or iron 2)The crowd barrier has both auti-rust indoor and outdoor design,light, free combination, convenient to satisfy different situation with it's elegant design and strong structure,good at decoration and practical.3)The barrier is developed to use as safety device to control crowds is various types of events,ranging from pop concerts or ourdoor events.The size is:1.25*1*1.2m 4)It is the guardrail used in performance for protection, which is easy to install, as well as beautiful and practical