Features:

-easy to use and clean                                                                     

 -containing mark clear to read,

-no breakage in the tube.

-Bellows and bite can be removed,

-Dual-use, inhale and exhale, adjustable flow

Specifications: 

1.Minimum vital capacity measurement:600cc

2.Maximum vital capacity measurement value:1200cc

3.Dimension:151.7mm x 58.5 mm x 130.7mm

4.Weight:0.165KG

Packing:

-Giftbox+ Plastic bag protect + Instruction manual

-Gift Box:15x8.5x13.4cm

-Carton size: 46.5 X 28 X 45 CM( 30pcs/ carton )

-Gross Weight: 4.95 KGS

-1 X 20″FT Container :14400

https://shenzhen-birich.en.alibaba.com/view/showroom