Alvin Flexible Curved Rulers Type_Stencils and Templates Col-o-ring ink testing books are

Col-o-ring ink testing books are printed

Available as a ten pack of 11 x 17 inch sheets

Professional adjustable triangle created from clear plastic and features inking edges

With one page for you and one page for your child

Alvin Flexible Curved Rulers Type_Stencils and Templates Col-o-ring ink testing books areLightweight aluminum core is easy to shape and holds any curve firmly for accurate drawings. Graduated in both English and metric. Inch graduations in 16ths and 32nds are color coded black for quick identification. Metric graduations in mm and cm are color coded red. Inking edges for pen and marker use and flat edges on both sides for pencil drawing.