• Smooth interior allowing laminar flow
• Constructed of plastic for greater comfort and no cardboard taste
• Large size for standard unit
• Small size for low range unit
• For use with Mini-Wright Peak Flow Meter
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.