Interpet Gold Filtration Starter Kit Includes 1X Aqua Air Mini With Instruction Leaflet, 1X Check Valve, 1X Round Airstone 7/2", 1X Airline Tubing 1M, 1X Undergravel Filter Plate, 1X Replaceable Filter Cartridge And 1X Plastic Plant For Cleaning And Purifying Water For Healthy Goldfish Bowls.