Castors are mainly used for furniture, office seats, small carts, suitcases, and also for mobile medical equipment such as medical beds, medical vehicles, rescue vehicles, medical transport vehicles, anesthesia vehicles, medical record vehicles, medical chairs, etc. They are divided into all plastic double wheels, silent type, braking type, non braking type, and omnidirectional wheel. The dimensions range from 2 inches to 5 inches (Chinese measurement units), and the metric measurement units are 6cm-18cm (diameter).

The main material is PA6+TPU.