asthma meter peak flow meter used to monitor lung health for people with respiratory conditions such as asthma or emphysema. for children or adults Brand: Tru Zone Trudell Medical International comes with original box, instructions, chart instructions in English, French & Spanish washable, easy to clean only used a couple of times for my daughter's asthma. measures 7 inches long A mechanical Peak Flow Meter will allow you to measure PEF (Peak Expiratory Flow), the speed of the air blown out of your lungs. The measurement shows how well the air is moving through your airways. Pickup in Gordon Head, or FREE DELIVERY if you buy minimum $20 worth of items (I have lots of items posted up), pay first, and location is in Victoria, or I can meet you at one of the malls in town. All items are from my smoke-free and pet-free home and are cross-posted. click RIGHT ON the photo to see entire picture Discount for buying multiple items May be open to trades, depends on what you have :)