Pack of 50 Disposable Cardboard Mouthpieces (Type A, Compatible for Contec Spirometer SP10 and many other brands)
Standard Type-A Cardboard Disposable Mouthpieces
Mouthpiece Dimension:
Outter Diameter 30mm (1.18" O.D.)
Inner Diameter 28mm
Length 64mm
Material: Cardboard
Quantity: 50