Triangular Scale 15cm for Drafting 1/100, 1/200, 1/250, 1/300, 1/500, 1/600 Stained with red and brown ballpoint pen ink Stainless Steel Ruler Both are made in Japan. Compact size, fits in a pencil case, and is a convenient scale. For those who need it. Architecture Design Drafting Civil Engineering Design Stationery For Architects Ruler Scale Scale