The Rain Wizard Connector Kit is your tool for expanding the capacity of your Rain Wizard collection system. Though some people are able to buy multiple barrels that hook up to separate downspouts at their home, others may have obstructions that remove that option or make it difficult to work around. That's why we've designed our rain barrels to be linkable. This way when one rain barrel is full, it will overflow into the rain barrel next to it. Setup can be done quickly and just requires a screwdriver for the clamps and a drill with a ¼ in. -3/8 in. bit. Compatible with all Rain Wizard rain savers except for the Rain Wizard Rock (RWWR42), Rain Wizard Big Blue 55 (RB55-BLUE), and the Rain Wizard 300 (RW300). Material: Plastic.