1.2 For used products, the guarantee period is 12 months (Verbrauchergüterkauf, § 474 BGB, i.e. consumer goods purchase – German law book § 474 BGB), for commercial and / or business use there is no guarantee. Used machines or parts are delivered with those accessories that are available in the condition as described at the point of finalized contract. Liability is also excluded for open or hidden defects even if the product has not been previously inspected by the consumer, unless all4tec deliberately conceals information concerning known defects or by negligent withholding of such information.