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Drawing and measuring instrument in the shape of a triangular prism with a star shaped section with six points or sides, each with a 30 cm graduated ruler. Each one of these sides is graduated with different scales, which are normally 1:100, 1:200, 1:250, 1:300, 1:400 and 1:500. The 1:100 is also the 1:1 scale, normally used as a ruler graduated in cm. There are also other types, such as the triangular profile and the pocket or fan, which consist of different strips at one end. The scale meter can be made of wood, metal, aluminium, etc.
