The color coded center groove easily identifies scale graduations. Measurements are precision-etched into a durable laminated plastic for accuracy. Comes in a protective case. Architectural Scales—Color coded, 3/32; 1/8; 3/16; 1/4; 3/8; 1/2; 3/4; 1; 16. Ruler Type: Triangular Scale; Length: 12"; Material(s): Plastic.