Specifications:This scale ruler is made of aluminium alloy, which makes it ultralight, durable and not easy to break.The multifunction triangle scale ruler is the perfect tool for engineers, technical drawing and architects.It features clear and accurate scale with fine workmanship, convenient to use.Item Name: Scale RulerMaterial: Aluminum AlloyRange: 0 - 30cmSpecification: 1:500 Large ScaleRatio: 1:100, 1:200, 1:250, 1:300, 1:400, 1:500Features: Ultralight, Fine Workmanship, Large ScaleSize: 32cm x 2.4cm x 2.4cm/12.6" x 0.94" x 0.94" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Scale Ruler