APEX Model 921 Raised Pavement Markers

APEX Model 921 Raised Pavement Markers consist of an ABS plastic shell filled with a tightly adherent potting compound. The shell of the APEX Model 921 contains one or two glass covered prismatic retroreflective faces as required to reflect light from a single or opposite directions. APEX Model 921 color conforms to the color requirements of ASTM D4280.