These reflective triangles warn on-coming traffic of emergency situations. They meet Safety Standard 125 and can withstand wind velocities of up to 40 m.p.h. They triangles are easy to set up and fold down quickly for storage. Made of rugged plastic, these triangles a cross base with non-slip pads. Each measure 17-1/4" x 16-1/2" x 17-1/8". Sold per set of three and includes a handy carrying case.