The RPS Studio Light Kit Bag is designed for the RS-4002, RS-4003, RS-4082, and RS-4083. Simply remove the cardboard boxes from the original carton which contain the reflectors and light units and place in the front compartment. Remove the light stands and the cardboard sleeve and place in the rear compartment. If using with umbrellas, you may discard the cardboard sleeve and store the umbrellas and stands in the rear compartment.