... *350*50mm(alternative) end speed humprubber end speed hump ,rubber road bump , Rubber speed ramp, Speed breaker,speed hump,speed bumpSpecifications:Body ... roads and concrete roads.2) To improve life span ,the road must be smooth.After drilling,clean up the holes and ... adhesive,put the bottom of the bump to the surface of the road 3) For A type road bumps,use a ateel bar ...