Circuit wire this is great for home school making and breaking a single electrical connection circuit experiments. Good for teaching basic principles of electricity and how a simple circuit works.These are great for demos and project. Easy to use and great learning tool for kids. I think practicing on an education model would definitely good for any student. Features - Color: Black and red. - Material: Copper. - Size: 40.00 x 1.50 x 0.50cm/ 15.72 x 0.59 x 0.20 inch. - This is great for home school making and breaking a single electrical connection circuit experiments. - Good for teaching basic principles of electricity and how a simple circuit works. - These are great for demos and project. Easy to use and great learning tool for kids. - Practicing on an education model would definitely beneficial any student. - Of course that while this does teach them how electricity works, you have to make sure to teach them not to play with actual electrical equipment around the house..You'an store products Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Dadangjia