Aqua One Stellar Air Pumps will help you provide the necessary oxygen within your aquarium, creating a healthy environment for your fish. Stellar Air Pumps are quiet, powerful and energy efficient. Features and benefits: Quiet, energy efficient and powerful Built in air filter Compact sleek design Long life silicon rubber diaphragm Includes check valve Vibration absorbing rubber feet Suitable For: Coldwater, Tropical & Marine Specifications: 94132 - Stellar 60, max flow 60L/hr, 2w, single outlet 94133 - Stellar 110, max flow 110L/hr, 3w, single outlet 94135 - Stellar 200D, max flow 2x100L/hr, double outlet 94136 - Stellar 380D, max flow 2x190L/hr, double outlet Please note you will need airline, check valve (safety valve) and an airstone to operate.