Bocianelli Plastic 30cm Triangular Ruler, Metric, 12 Scales for Architects Engineers, Black with White Letters

Scale 1:20 1:25 1:50 1:100 1:125 1:150 / 1:200 1:500 1:1000 1:1250 1:1500 1:2500 Length: 30cm. Supplied in rigid transparent plastic box for easy storage and protection. Made of black plastic with white letters and red green and black color stripes 2 scales on each side of the ruler (12 different scales in total) - covers most of the scales used on architectural and engineering drawings . High quality ruler for professional applications, architecture, engineering, technical drawing.