The Delonghi TL1857 Portable Air Conditioner Stopper And Flange, the perfect solution for your air conditioning needs. This innovative product is designed to provide a secure and reliable seal for your portable air conditioner unit. The stopper ensures that your air conditioner stays in place, while the flange helps to create a tight seal, preventing any air leaks and maximizing the efficiency of your cooling system. Say goodbye to unwanted drafts and hello to a comfortable indoor environment with this essential accessory. Trust Delonghi for quality and performance when it comes to your air conditioning equipment.