At origin the word `opera` means `product of human mind` from both an intellectual and a material point of view for this reason opera elements means that human activities have to be in harmony with nature and the elements surrounding our existence.The recall to nature is not a casualty: global warming, greenhouse effect, water and hydrology problems are all very crucial and actual themes and visconti interprets their message with a line that reminds us of our habitat.This collection comes in four colours: yellow for air, red for fire, blue for water and black for earth. The four elements appear quite evidently, indeed we have also white, a colour common to all four pens and which also brings its own significance: it's the fifth element, the aether, the transcendence.Marbled resin grey earth.The ballpoint can be fitted with a capless roller cartridge, a ballpoint refill, or an air jet refill.