4.5 In Caster Wheels with Ball Bearings Brake Heavy Duty Casters Set of 4 +bolt

4.5" casters I have zero info on these, they look to be fairly heavy duty, they are boxed and unused, they have ball bearings and two in each set swivel and 2 are fixed, all have a 4 bolt mounting pattern and come with hardware. I have 5: Casters NEW in another listing as well.