Features:

100% brand new and high quality.
Material:PVC
Color:Transparent
Size:4*3 cm/1.57*1.18 in

Material: Made of PVC, reliable and safe, product meets standards, material does not contain latex
Dimensions: Coarse inner diameter 1.6 cm/0.62 in, outer diameter 2.2 cm/0.86 in, fine inner diameter 1.6 cm/0.62 in, outer diameter 1.8 cm/0.7 in
Transparent shell: Transparent shell for easy observation and real-time understanding of the patient's condition
Purpose: Artificial respiration training emergency supplies, mainly used as accessories for emergency masks
Barrier function: It provides barrier protection for rescue personnel in emergency situations
Portable: Small in size, can be carried around in a pocket

Package Contents:
4 x One Way Valve for CPR Mask