Product Name: Rubber Road BumpModel Number: DH-211 / DH-212Place of Origin: ChinaInstallation instructions: 1) Speed bumps can be installed on the surface of asphalt roads 2) To improve life span, the road must be smooth. After drilling, clean up the holes and remove the dust, oil and debris from the holes. Using the special adhesive, put the bottom of the bump to the surface of the road 3) For A type road bumps, use a steel bar to link them up from the middle holes in order to strengthen the power of force resistance 4) The anchor bolt and the hole must be matched in size 5) Using the rubber bolts for installation on asphalt roads and anchor bolts for concrete roads Specifications: 1) Size: 1000*300*45 / 1000*380*50 mm 2) Weight:12kg , 18kg 3) Compression resistance:>200mpa 4) Top expansile bolt: M12 * 40 with hexagon bolt 5) Durability: Model A-I >4years, Model A-II >2years. 6) Fade resistant:>Grade 7