Alvin 110P architect's scale ruler. 12" plastic triangular scale is ideal for scholastic and vocational use. Satin finish, high-impact white plastic with tapered edges. Sharp, easy-to-read graduations resist wear. Architectural graduations: 3/32, 3/16, 1/8, 1/4, 1/2, 1, 3/8, 3/4, 1-1/2, 3 inches to the foot; one edge 16ths. Great for school and student use. Alvin architects ruler.