heavy duty locking swivel caster 1.material:pu,steel 2.roller/ball bearings 3.6mm fork 4.capacity:250-350kgs heavy duty locking swivel caster1.zinc plated finish to resist corrosion,bruise and dent etc.2.package:normal carton,plastic bag3.use:suggest to used i n many quiet and floor-protected application like medical field,electronic manufacturering,hotel and super market etc. Item numberwheel ...