Plastic demarcation is used on the escalator steps. Its teeth are unfixed. Some has 17 teeth while other has 22 teeth. Even some plastic demarcations do not have any teeth. The plastic demarcation can be divided into 2 kinds, one is used in stainless steel step while the other is used in aluminum step. It also has many colors,including yellow,black,grey and so on.
Escalator plastic demarcation