Made of molded urethane, SBM-1225 comes in 4' stock lengths, and is installed with lag screws and nylon plugs. End caps are also available for a more finished appearance (SBEC-1225). Available in safety orange, these modular interlocking speed bumps have a ribbed surface to further ensure traffic control. Length: 4 feet Material: Molded Urethane Recommended Installation: Lag Screws and Nylon Plugs Color: Safety Orange