First Class School Chair Legs with Casters, Small - Box of 4Mobility 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. Image is for illustration purposes only. Please check the description and SKU before ordering. Features Height adjustable legs with wheels offer safe mobility Rear legs include brakes and anti tippers Easily attaches to chair