These dry erase markers has a chisel tip and are about 5 inches in length and are perfect for the classroom, office or home. The Ink is made in Germany and provides consistent and bold colors which are highly visible even in long-distance, perfect for the classroom and office meetings. You can use it on any non-porous surface including porcelain or melamine whiteboards and glass. The ink cleans easily with a cloth or with Think2 Eraser. Think2 Dry Erase Marker Set includes all you need to get started with your whiteboard. Set includes an eraser, a 2.5 ounce cleaning spray for your whiteboard and markers.