Capacity up to 200 pounds per caster. These casters have a low initial cost. They were designed for intermittent usage ( light duty ) on manually moved equipment, rolling on smooth floors, in applications where there is no abuse. The swivel consists of one row of balls rotating on an unhardened raceway. The wheels have a Plain Bore ( PB ). Despite the lack of a double ball bearing swivel turning on hardened raceways and the absence of an anti-friction bearing in the wheels, this caster holds up amazingly well in many applications. You may want to consider our caster Model 3. It represents a better return on your investment because it provides higher capacity, easier rolling, longer caster life and a wider selection of wheels.