Linka is a system of reusable rubber moulds that are used to cast interlocking plaster pieces. These pieces are glued together to make incredibly detailed and realistic looking HO/OO scale (1/76-1/72 or 20-22 mm) structures that resemble brick, stone, and timber buildings. Although originally scaled for "British OO" (1/76), Linka moulds are ideal for scales as small as 1/87 and, with some modification, as large as 28 mm.