The Purpose Of The Present Dynamic Acquisition System (Hereafter Sda) Is The Supply Of Materials Of Different Types With Environmentally Friendly Means Of Transport So That The City'S Maintenance Service Of The Area Of ​​Territory, Ecological Transition And Planning Can Stock Up On Supplies And/Or Minor Services To Carry Out Maintenance Work On Public Space And Municipal Equipment In The Municipality Of Sant Feliu De Llobregat. The Different Types Of Materials To Be Acquired Through This Sda Correspond To The Following Categories: Categories Category 1: Construction And Related Materials Category 2: Paint And Related Materials Category 3: Hardware And Related Materials Category 4: Carpentry And Related Materials Category 5: Hardware And Related Materials Category 6: Fresh Concrete Category 7: Gas For Hardware Workshops Category 8: Natural Stone Category 9: Maintenance And Construction Chemicals Category 10: Electricity Category 11: Plumbing A Company May Present Itself In The Sda In One Or More Categories As Long As It Complies With The Requirements Set Out In The Specifications. For Each Category There Will Be One Or More Approved Companies That Can Be Presented In The First Call Or Throughout The Validity Of The Sda. The Selected Companies Will Be Able To Participate In The Subsequent Tenders That Are Called (Hereafter Specific Contracts) In The Terms Provided For In The Specifications. The Specific Contracts Will Be Tendered For Each Of The Categories And May Include One Or More Products. The Companies Must Offer All The Products That Are Tendered In Each Specific Contract.