Alvin 280XP architect's flat scale ruler. 12" two-bevel white high-impact plastic. Engine-divided graduations for accuracy: 16ths and 32nds to represent 200' on the 16th scale; 16ths and 32nds to represent 400' on the 32nd scale; 1/16" and 1/32" to the foot. Includes vinyl storage sheath. Quality-made in Germany.