For traffic control and authorized vehicle access, these double bollards are a great solution. The double bollard includes two heavy duty steel, hinged halves which are only three inches high when collapsed, but present a formidable traffic barrier when upright. This low clearance level ensures that all authorized vehicles can pass through, even particularly low vehicles. This double collapsible bollard post is held upright by a padlock secured pin at the top, ensuring it is safe from any snow, ice, or other road-level hazards.The pins are high quality, rust-free stainless steel. The bollard comes finished in high visibility safety yellow DuPont Imron® paint that is sure to last. The double retractable barrier from TrafficGuard, Inc is an affordable way to regulate traffic and promote safety, easily allowing authorized automobile access while keeping out unauthorized vehicles. For more information on this and other folding parking posts, contact us at sales@trafficguard.net or 877-727-7347. We are more than happy to answer your questions about our products or to help you determine which product is best for you.*TrafficGuard, Inc complies with the Buy American Act (41 U.S.C 8302-8305)Benefits:All TrafficGuard, Inc products feature heavy duty steel constructionOffers 3″ vehicle clearance when loweredHigh lock position keeps padlock away from snow, ice and debrisPin keeper secures stainless lock pin and padlock from lossHigh visibility safety yellow3M® reflective labels for added safetyRust free stainless steel pinsAll surfaces are primed with rust & corrosion resistant, zinc rich primer w/5,000 hour salt spray performanceStandard finish, TGIC polyester outdoor finish RAL1028 yellow