The U.S. Embassy in Dhaka, Bangladesh, issues this combined synopsis and solicitation for the supply and delivery of brand new, original air filters for Air Cleaners. All products must be genuine, unu... The U.S. Embassy in Dhaka, Bangladesh, issues this combined synopsis and solicitation for the supply and delivery of brand new, original air filters for Air Cleaners. All products must be genuine, unused, and fully compatible with Blueair 505 and Blueair 605 models.