The Giant Magnetic Base 10 Demonstration Set that bring base ten to your white board large enough for the whole class to see! Demonstrate essential number concepts on your whiteboard so the whole class can see. Use Base Ten concepts to reinforce a variety of numeracy skills: Place Value Estimation Fractions Decimals Arithmetic and Percents. Demonstration pieces feature real-life photography and the magnetic backing allows for use on whiteboards and other magnetic surfaces. The set includes 131 Base Ten pieces: 100 units 20 rods 10 flats and one cube. The flats measure 170mm and the units measure 15mm.