Siraja Biak Biak came from the Lintong Nihuta area, North Sumatra. This coffee bean is included in the class of Arabica seeds. The advantages of these coffee beans, in general, have a superior flavour, smoother textures, and complex flavours and aromas. The majority of Arabica coffee beans can only grow optimally in highlands such as mountainous areas. That’s why the majority of Arabica seeds are more expensive and exclusive compared to robusta seeds.