Mr. Zhuo Dong, I am looking for a motor that will be submerged in transformer oil. The sspecifications are as follows.6.54" from end bell to shaft and 3.86 max. wide. Type A.C. reversible. 5.43oz FT. Torque @1500rpm@115V . 60hz; 3.64oz FTmin starting torque @ 100v 60hz; 1.73 amp nominal starting current @115v 60 hz. duty cycle= intermittent (10%0; 3 minute max. continuous running time; lifetime 2,000,000,000 cycles of 6 second run time over a period of 15 years. Ambient = Fully submerged in transformer oil operating between -30*C and 85* C. Fram=Horizontal face mounted open enclosure. Dielectric test- 1500 volts,60hz for 1 secind in air.