They can produce the voice like metal when you stick each other, and they are mainly used in all kinds of sports games, vocal performances, parties and so on. They can encourage others and bring hotness atmosphere. The shape of them is square but has different heads like crew cut head, bullet head and tine head. The positive and negative of sticks can print kinds of color pictures such as enterprises’ marks. Their bright color can bring good propaganda effect and lots of business chances for suppliers. They are made of PE materials, safe and innocuity. They have equipments of automatic sealing and puffing which can puff and deflate. They also can be used time after time. The effect of obturation is very well.