Mobility legs quickly and easily convert a First Class seating system into a convenient mobile chair. The four swiveling casters allow easy movement of the chair with the seated child. Wheels lock securely in place for security.Features and BenefitsHeight adjustable legs with wheels offer safe mobilityRear legs include brakes and anti-tippersEasily attaches to chairProduct SpecificationsActual Product Weight: 4.95 lbsOverall Product Height: 3.6"Overall Product Length: 12.8"Overall Product Width: 7.38"Primary Product Color: BlackPrimary Product Material: SteelWarranty: Limited LifetimeModel # fc 2029n, fc 4029nSize: SmallDrive Item # fc 2029nSize: LargeDrive Item # fc 4029n