The item is a cool and funny single pole , which is mainly made of lightweight plastic and copper for and easy to play with simple operation to make it especially designed for beginners. Easy enough for junior students and kids to explore in advance and get interested in physics science. Features - Color: Black. - Material: Plastic, copper. - Size: 7.50X3.50X0.90cm/2.95X1.38X0.35 inch. - These light weight physics experiment equipment are perfect for physics demos and projects in school. - It is also suitable for kids to practice and DIY fruit battery at home, which is good for keeping children’s creativity and enhancing intelligence. - Screw type binding post,If you use clips you might want to temporarily remove the connector knobs. - Improve the ability of analysis and operation. They can practice their hands-on ability. - Fine workmanship and creative appearance ensure its popularity and practicality. Package list: 6 x