Procat Scale 12", 1:20,1:25,1:50,1:100,1:125,1:400

Lightweight and durable scale stick / ratio ruler made of aluminum. Scale sticks are used for converting different measurement ratios, like in design and floor plan work. The ruler has six common ratio conversions marked on it, which help you turn real-world measurements into a scaled-down size on design paper.

The scale stick is 30 cm (12") long. Includes scales: 1:20, 1:25, 1:50, 1:100, 1:125, 1:400