How and Nosm (Raoul and Davide Perre), are two identical twin brothers known for their large-scale graffiti-based murals that adorn countless city walls around the world.?Their red, black, and white-based imagery is instantly recognisable and commands attention through the impressive size and intricate detail. ?Initially, the colour palette was limited for practicality but instead has become a distinct calling card and formal choice that has allowed these artists to push spray paint to a new level.