... ,cold resistant,hot resistant,anti-impact,not easy to bend2.With water in it ,the buffer elasticity will be better,without ... rail .(2) Bright in color,instruct the road clearly .(3) Connecting with each other make the complete enduce power much stronger .Light ... labor and cost.(2)Flexible apply to any road .(3) Connecting with each other make the complete enduce power much stronger .(4 ...