About Round Type 38

This device helps users recognizing if the light inside a room is on from outside. The indicator lens can be easily attached to the door by pushing it into the hole (prior drilling needed). The thin ring on both ends is designed with a wider surface to hide the mark of the drilled hole on the door.
Not only available in a convex lens, but the standard type also has a lens shaped like a diamond cut to reflect the light better. In addition, this type is available in 11 different colors to complement any doors color.