EasyPro LA20N Diaphragm Linear Aeration Kit, for Ponds up to 40000-Gallon Linear compressors have few moving parts, making them very reliable Multiple diffusers for larger Koi ponds, Diaphragm linear aeration kits include weather resistant compressors allowing use outdoors Powered by quiet, continuous duty compressors, these small aerators do a great job of aerating all year long Kit includes EPW10 compressor, two rolls of 50-Feet Quick Sink tubing, valved air splitter, and four air diffusersTwo year warranty on compressor, 5 year warranty on tubing and diffuser 115 Volts, 96 Watts, Maximum Air Flow 5.2 CFM, Maximum Depth 10-Feet