... A/C·The case material: ABS engineering plastic, compact and solid·The blade is made of plastic-Al, injecting in ... Korean, etc ), Pass the QS9000, ISO9001, UL, CE certification.· Equipped with American- produced poly filter gauze, Clean the air high efficiently ... , Blade move smooth·Some are preplaced with the fixing nut, which convenient ?the assemble. XF-3 Fresh Air Curtain for Bus Air Conditioner