Fixed casters without rotation structure and it can not swivel,Swivel casters allows 360 degree rotation

According to usage they main include medical casters, industrial casters,supermarkets casters, furniture casters. 
 
Hospital medical casters need meet lightweight,flexible swivel,good elastic,wear resistance,noise reduce and chemical corrosion.

Industrial casters mains refer to machinery and equipment they usually used in factory,They can beuse PA6,Polyurethane wheel,and rubber wheels.The industrial casters need have high impact resistance and strength.

Supermarket casters need high flexible operation

Furniture caster need have low center of gravity / low profile,as they need loading high weight,furniture caster wheel mainly involve super synthetic rubber casters, polyurethane casters, plastic casters, nylon casters, steel casters, high temperature resistance casters, rubber casters, S-type synthetic rubber casters