Reduction scalemeter 1:20/1:25/1:50/1:100/1:200 Koh-i-NoorThe 300mm trihedral ratio scale is made of white polystyrene.Hot stamping technology is used to print the scales of 1:1000, 1:2000 and 1:5000.Scale accuracy of 0.2% of length.To facilitate distinction, the sides are identified with yellow, green and red stripes.This makes the trihedral ratio scale primarily predestined for use in geodesy.Made of white plastic.Marked in cm and mm.Length: 30 mm.Brand: Koh-i-noor.