European Open Procedure Tender For The Assignment Of The Supply Of High Density Polyethylene Bags (Hdpe) Composed Extrusion With Low Density Polyethylene (Lldpe), To Be Used In The Context Of Urban Solid Waste Collection Services (Differentiated And Undifferentiated) In The Municipalities Of The Provinces Of The Province Of Sondrio. Period 01.09.2025 - 30.04.2026