30cm 300mm Professional Metric Plastic Set Square Drawing Drafting Triangle 60Degrees 30cm 300mm Professional Metric Plastic Set Square Drawing Drafting Triangle 60Degrees Dimensions: 34.5cm (hypotenuse) x 30cm (scale to 29.5cm) x 17cm , 60 degrees. Thickness: 2.5mm. Made from transparent, light blue tinted perspex. The rate of transparency allows to see the drawing medium below template for easy positioning. Raised edges for ink drawing and mm graduated scale. High quality, durable set square for professional applications: technical drawing, art, craft, engineering, architecture.