The present disclosure relates to internal combustion engines and the teachings may be applied to a roller for a roller plunger of a high pressure fuel pump, to a roller plunger which is equipped with a roller of this type, to a high pressure fuel pump which has said roller plunger, and/or to an internal combustion engine having a crankshaft which comprises the high pressure fuel pump. A roller for a roller plunger of a high pressure fuel pump may include a first roller region comprising a first material, a second roller region comprising a second material, the first material and the second material connected to one another in order to form a composite roller volume element, and the first material having a lighter density than the second material.
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