These long lasting, continuous duty compressors produce more air volume than other compressors, but create less pressure. All models have an 18′ maximum operating depth. Oil free compressors are excellent for pond and lake aeration and de-icing. The carbon vanes self adjust to maintain maximum efficiency and are easily replaced when worn out. All units come with air filter, a 7′ power cord and one year warranty. All units are available in 115 and 230 volt, please specify when ordering.