ENVIROform Portable Sign Units are ideal for parking lots, crosswalks, guard booths, schools, malls, industrial and construction sites, or anywhere portable or temporary signs are needed. Base is made from 100% recycled rubber and will not chip, crack or corrode. For excessive high wind areas we also make a 30 pound extender to add to any of our octagon bases creating additional stability. Lighter weight models are ideal for indoor or light temporary use. Measuring 18" x 18" x 6". The portable base makes parking lot maintenance and snow removal tasks easy. The sign base unit may be used in both indoor and outdoor settings. Bases clean up like new with whitewall tire cleaner (no wiping). The use of just one economical unit will provide enhanced vehicle and pedestrian safety and provide you with reduced liability/damage.