Please read description carefully.
Do not base your order on the picture presented.
The valve is an Accessory for the ADC Adsafe CPR Pocket Resuscitator.
Dimensions: 1.38" x 1.25" x 1.25".
Item shown is ADC4053 - the complete Adsafe pocket resuscitator. Arrow is pointing to the valve.
More information on the complete Adsafe™ CPR Pocket Resuscitator can be found by searching for model # ADC4053.