lightweight, durable peak flow meter helps patients track daily changes in their breathing patterns. #36110-10/cs Pediatric size (Low Range 50-300 L/min). #36111-10/cs Adult size (Standard Range 50-800 L/min) #36117-100/cs Pediatric Mouthpiece Disposable #36118-100/cs Adult Mouthpiece Disposable Latex Free UNSPSC#42271604