Ndd Easyone Pro� Replacement Parts Each 3100-50.4 by ndd Medical Technologies GROUP: Diagnostic Instruments:Patient Monitoring/Vital Signs:Spirometer Accessories Item Description: Pressure Tube, 8 mm, For use with EasyOne Pro� Lab Only (DROP SHIP ONLY) Packaging Desc: Tube Pressure 8Mm (Drop) Country of Origin: Harmonized Tariff Code: Product Description: