1. Nsk Ball Bearing, Acceptable For Continuous Operation Of 5000h 2. Operating Temperature Range - 20°c ∽ 50°c 3. Insulation Class F 4. Enclosure Class Ip 44 5.casing Made Of Abs (Fr) 6.backward-curved Centrifugal Impeller Using Pa66(Fr) 7.abs (Fr) Connection Box 8.external Rotor Motor With Low Temperature Rise 9.motors Is Equipped With Automatic Reset Thermal Overload Protection.