道路のストッド高速道路の交通反射器で,道路標識とも呼ばれます. They are a kind of traffic safety product
that is mainly installed in the middle of the road marking line or
the middle of the double yellow line to remind the driver to drive
according to the lane through its reverse reflection
performanceスピークの仕様は,一般的に136mm*50mmです.