... ADC12 aluminum alloy2. Insulation Class: F3. Power Source: Electric blower4. Motor Class: EFF 25. Certificate:CE Marking6. Usage: blow, Hoover, ... TEFC IP55 and insulation F, high temperature resistant to180°2. Motor reached Europe EFF2 standard, save more electricity, and more ... lubrication needed.5. Sealing ring is placed between housing & motor to prevent entry of foreign matter, improve service life; ...