With tracing edge and Finger lift. For 0.5 mm pen. Contains 45 circles from 1 to 10 mm in 0.5 mm increments and from 11 to 36 mm in 1 mm increments. The circles are equipped with tangent squares for accurate positioning. Also contains 360/5 protractor and % division 100/1%, 16 cm ruler and 4 corner radii of 20, 22, 25 and 28 mm. 3.5 mm lettering area, numbers and arrows. Material: 1,6 mm green transparent SBS.