These accessories reflect the light in the same direction from which it comes from, no matter what the angle of incidence can be. AECO reflectors are made of plastic (PMMA),  impact-resistant material, with temperature limits ranging from -10°C up to +60°C. They are very performing when used with photoelectric sensors.
They are supplied in the parallelepiped and cylindrical shapes, in different dimensions as well as in the adhesive reflective tape version too which, however, is half performing compared to the rigid plastic models.