For dogs who need an inhaler. Works great. Comes with instruction booklet and two sizes of masks to fit most dogs. With gentle, gradual introduction and a few treats, both my dogs willingly accepted the treatment. I paid over $100 at my vet. - Vet tested, dog approved aerosol holding chamber (spacer) for dogs with bronchitis, allergies, collapsed trachea, and breathing difficulties - Confidence in medication delivery with the Flow-Vu* inhalation indicator which helps you count breaths and ensure mask fit - Holds medication longer so your dog has more time to inhale - Makes more medication available from each puff for your dog to breathe in – better performance means less waste which could save on drug cost - Easy to use antistatic canine aerosol chamber helps deliver any Metered Dose Inhaler medication to the lungs - Designed for dogs with custom valves, and 2 non-stick silicone masks that fit all dogs Made in Canada with parts from Canada and USA Smoke free home near Jubilee Hospital