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Kaeser Compressors’ M57 Mobilair portable compressor is a 45-hp unit that delivers 210 cfm at 100 psig. It’s the longest running portable compressor in its class with the largest fuel tank. The power-saving Sigma Profile direct drive airend combined with an oversized fuel tank provides 10 hours of uninterrupted operation. The heavy-duty 4-cylinder diesel engine with cold-start battery ensures reliable operation even in severe conditions. The solid steel floor and panel insulation greatly reduces noise levels. The powder-coated enclosure with gull wing doors provides easy access to all service points and the large toolbox. The torsion bar suspension system and oversized tires provide excellent road handling.