There is an ancient Chinese saying, 'If you want it, send it!'! Never leave the eight! This is an unsupported, super loud eight whistle with a very loud sound. Based on my previous design of ultra-thin whistle, it only requires 8 grams of consumables for printing. I am using Tuozhu's PLA, but you can also use other consumables for printing. Can be used to summon dogs outdoors or for children to play with. Wearable design. I wish you like it. (Attention!!!! The size is small, please do not use it for children who are too young!!!! I am not responsible for any accidents that may occur as a result!!!)