... >2years. Fade resistant: >Grade 7 Product name : Rubber Wheel StopperItem : NK-SH-11Details :1.Middle part:100/50* ... managerUsage:Mainly used for city intersection, highroad crossing, toll gate, garden, village, parking lot, and gas station, ... ) For A type road bumps, use a steel bar or PVC pipe to link them up ... easily purchase on local market) NOKIN 2012 High Quality and Discounted Rubber Wheel Stopper