Feature

●Mouthpiece size: 1.6 x 0.7 x 0.1 inches (40 x 18 x 3
●Size when stored: 2.8 x 2.0 x 1.2 inches (70 x 50 x
●Material: Mouthpiece: PP (polypropylene), One-way valve: silicone rubber, Seat: PVC (vinyl chloride resin)
●Sheet Size: 8.3 x 7.9 inches (210 x 200
●Comes in a plastic bag


Description

Comes with a one-way valve (check valve), so it is effective in preventing infections.
It has low air flow resistance and has no misalignment, ensuring a stable amount of blowing.