This Linex triangular scale ruler is designed for precision in technical drawing and architectural tasks. Measuring 30cm in length, it features a range of metric scales including 1:100, 1:200, 1:250, 1:300, 1:400, and 1:500. Constructed from durable white polystyrene, the ruler is equipped with colour-coded grooves that allow for quick and accurate identification of the desired scale. The instrument arrives protected in a sturdy hard plastic storage case, ensuring it remains clean and undamaged between uses.