An antistatic chamber designed to deliver asthma medication effectively with a large-sized mask for optimal fit. FEATURES: ‣ For common asthma medications. ‣ Low resistance valves open freely, even under low flow rates. ‣ The built-in whistle lets you know if you are breathing in too fast. ‣ Easy-to-clean design for convenient maintenance. ‣ Latex-free material for safe use. SPECIFICATIONS: Length: 14.2 cm (5.6") Mouthpiece: Interfaces w 22 mm connectors Volume: 140 ml