... .75 Safety settingsCompressor overloaded protector, Over Current protector, High-low pressure switch, Temperature protector. Outer size(L×W×H)mm680×600×1100 ... 1/2Safety settingsCompressor overloaded protector, Over Current protector, High-low pressure switch, Temperature protector.Outer size (L×W×H)mm1900×900×1700 ...