The cube moulds side can be supplied in different models, each one with different characteristics and weight. All the models have a reinforced band on the walls, and the inside surfaces are very smoothed getting easier the specimen's ejection. It grant an additional resistance, and foresee a "X" reinforced band on the base, improving the strength of the mould, and allowing the user to give small blows with a rubber heated hammer by easing the specimen's ejection.