Frame:90mm Speed:1400 ,1700min Insulation Class:,B Duty: S1 1. It is with centrifugal switch,which are suitable for high start torque application as air compressor, 2. It's know as low temprature rise and low noise, 3,Spec Details: a.Frame:90mm b.Voltage:115,230v c. Frequency:50/60hz d. Power:1100-1500 w e. Speed:1400 ,1700/min g. Protection class:IP20 h. Insulation Class:,B d. Duty: S1