Alert drivers to slow down and be aware of potentially dangerous parking areas or driveways with KSC Speed Bumps. Constructed of 100% recycled plastic Highly durable, won't chip or crack even under heavy loads Withstands gas, oil, salt, sunlight and chemicals Never needs painting 4 ft. speed bumps in standard or deluxe 6 ft. speed bumps in standard or deluxe 9 ft. speed bumps in standard Easy to install, maintenance free Speed Bumps are non-returnable California Warning P65