[Mini Magnetic Whiteboard Erasers]They's magnetic so they're also AWESOME to create bar graphs and histograms on the board. Your students can vote or data by placing these up on the board. An excellent interactive way for students to construct and observe the shape of data [Easy to Use for All Ages]:Perfect for teacher supplies, They are excellent for the classroom, They are easy to grip and use for their small hands [Quick and Easy] Just swipe the eraser with a little pressure to efficiently clean your white board, calendar, lapboard, memo pads or from many other surfaces including melamine, porcelain, and glass [Material]: made of high-quality EVA, high density felt bottom. Eco-friendly, no smell, strong adsorbability. So you can provide the receiving child with additional resources that he/she can use for school [Wide Applications]: Suitable for home, office, school, dormitory, game room, play centers etc. Great help to managers, teachers, students and kids. Perfect for presentation, drawing, education and score counting Colour: red + yellow + blue + green Material: EVA + felt cloth Size: 10 x 5.5 x 2cm Package Contents: 6 x red eraser 6 x yellow eraser 6 x blue eraser 6 x green eraser Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.