Value pack: includes a full set of swivel casters! Resistant to abrasion, impact and corrosion.Smooth-running with low rolling resistance.Ball bearing swivel.Set contains: 2pc 1-1/2" swivel casters & 2pc 1 1/2" casters. ⚠ WARNING: This product can expose you to DEHP, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.