LUFKIN Four-bevel white scales made of high-impact plastic in 6" length. Printed graduations. Supplied in vinyl sheath. Architect scales have the following graduations 1/8, 1/4,1/2, 1",1-3/8,1-1/2,and 3" to the foot, Engineers scales have the following graduations double numbered 10,20,30,40, 50, 60 parts to the inch