1.3cm steel materials for the gas tank, firm and safe. 2. inlet pipe made by copper , durable, abstraction of heat . 3.the perfect welding techniques, coupled with the great paint processing technology, up to craft requirements 4.Add the over-current protection switch to protect the compressor heard safe 5.One way valve adopt stainless steel balls design, reduces the leak. 6.Stable performance, the noise in line with a quiet place where gas supply requirements. 7.Copper wire line's diameter of power line ensure compliance with safety standards, less heat and more safety control. Supply voltage:vac 50hz Electric current: 2.4a Power : 545w Flow rate: 70l/min Start-up pressure: 0.5mpa Discharge pressure:0.8mpa Air container volume:32l Noise:56-65db Weight : 27.45kg(32l) Package size: 46*45.5*71.5cm (32l) carton Color:Blue and white