Certain examples described herein relate to replaceable production material containers for additive manufacturing systems. In an example of a replaceable production material container, an electrical storage device provides at least one production material characteristic to an element of an additive manufacturing system. In certain examples, the electrical storage device stores a range parameter for indicating a production material characteristic offset value in a plurality of production material characteristic offset values. In certain examples, the electrical storage device stores a proportion parameter for determining the at least one production material characteristic on the basis of the production material characteristic offset value.