Materials: plastic
Castor Diameter: 25,50,75mm
Hole:4
Place of Origin:Hebei,China
Application: widely used in furniture, office facilities, luggage, tool carts, hand 

trolleys, and other industrial equipments.
Warm tips: Because there is always the uneven road surface, four wheels stress are not 

likely to be evenly.Load loosening is beneficial to prolong the life time of the wheel.