50mm Verulam engineers flat oval scale ruler. No.2 scales

描述

Professional quality Scale Rules unequalled for clarity and legibility available in metric and imperial scales. 2v available in lengths 150mm and 300mm. Scales: 1:5, 1:50 x 1:10, 1:100, 1:20, 1:200 x 1:500, 1:1000. Ideal for Civil Engineers