Vernier Calliper - Plastic-EIS-PH0078B offers a thoughtfully designed, durable resource for hands-on learning. Plastic, Columbus type calliper with dual scale. Plastic, Columbus type calliper enabling the user to read eitherinside, outside or depth measurements. With dual scale 0-12 cm x 0.1 mm Imperial scale graduated to 5 x 1/16” provided with thumb wheel for easy motion of jaws, in plastic case.