Frame:56mm Speed:2800 min Insulation Class:,B Duty: S1,S3 1. It's with high start torque of air compressor, 2. It's working with low temprature rise and low noise 3. a. Frame:56mm b. Voltage:115,230v c. Frequency:50/60hz d. Power:180 w e. Speed:2800/min g. Protection class:IP20 h. Insulation Class:,B d. Duty: S1,S3 4. Operation conditions: ambient temperature: -20°c-40°c,altitude≤1000m