Packing:12 sets/inner box,12 innerboxes/box,4 boxes/CTN Material:Mixed plastics handle and high quality nylon bristle Specification of brush:soft Heat resisting temperature:80 centigrade The special brush with double with double effect is very fiexible,and when you brush your teeth,it can massage and at the same time clean the tarter on and between the teeth,it can clean deeply,speed up the blood circulation,whiten the teeth and make the teeth healthier. The brush is new and durable,and it is made with special material and scientfic process,so you can use for a longer time. It has special penguin shape.There are two skidproof soft rubbers on the handle,it can match with your hand and make you control more freely and comfortable.