... /201/304 stainless steel, mirror face.3. Impeller, casting aluminum alloy impeller.4. Bearing of impeller, permanently sealed bearing, ... steel wire, thickness 2.8mm.8. Electrical motor, national-grade aluminum alloy frame motor.9. Shutters, galvanized board, 0.8 mm ... Opening system, push-pull centrifugal opening system. 11. Rivets, aluminum alloy and stainless steel rivets. 12. Cable, 1 meter long ...