Colour-coded inserts to aid quick scale selection Includes scales 1:1, 1:2, 1:5, 1:20, 1:50, 1:100, 1:200, 1:500, 1:1000, 1:1250 and 1:2500.Colour-coded inserts to aid quick scale selection.Includes scales 1:1, 1:2, 1:5, 1:20, 1:50, 1:100, 1:200, 1:500,...