Vapo - Model VP-BT01 - Breathing Trainer

Trainer Body: 157 (L) mm×135 (M)mmx64 (H) mm. Corrugated Tube: 108(L) mm x24(W) mm x22(H) mm. Mouthpiece: 63.5 (L) mmx22.36 (W) mm (H) N/A. Child suitable range: 250~2500ml. Adult suitable range: 500~5000ml.