Ndd Easyone Pro� Replacement Parts Each 3000-50.50 by ndd Medical Technologies GROUP: Diagnostic Instruments:Patient Monitoring/Vital Signs:Spirometer Accessories Item Description: Required Annual Replacement Parts Kit, Includes: Filter Pack, Gas Supply Tube, One-way Valve and Overflow Valve (DROP SHIP ONLY) Packaging Desc: Kit Replacement Part Annualeasyone Pro (Drop) Country of Origin: Harmonized Tariff Code: Product Description: