The Impact Locking Caster Set for Light Stands with 25mm Tubular Leg Ends features 3" (75 mm) rubber padded wheels that adapt to most light stand legs that have a diameter of 25mm. The wheels rotate 360 degrees and have foot-activated brakes for safety.
In general, these casters are not designed to work with C-stands. The angle of the casters will not match up with those of C-stands.