A. Product material: Food-grade silicone B. Dimensions: 7*2*1.2 cm C. Colors: Blue, red, green, purple D. Quantity: 4 pieces E. Package contents: 4 building block chewing necklaces and teething sticks (blue + red + green + purple) F. Sensory chewing chain: Our sensory chewing necklaces are made of silicone to meet your needs. They are strong, durable and soft in texture, with therapeutic and soothing effects. They can also help people break the habit of biting nails or sucking thumbs. G. Colors for stress and anxiety relief: Studies have shown that bright colors can trigger aggression, hyperactivity and excessive irritability (especially yellow, orange or bright red). Our chewing tags are dyed with soothing colors. They are suitable for fidgety children, those with autism, hyperactivity, aggressive chewing habits or sensory integration disorders. H. Safe and easy-to-detach fasteners: Our chewing chains are equipped with detachable buckles to make chewing safer and prevent choking and accidents. They are suitable oral movement chewing accessories for little boys and girls. I. Non-toxic food-grade silicone: Our products are free of BPA, latex, phthalates, cadmium, lead or metals. They are also suitable for adults (both men and women) and teenagers. J. Durability for most children: This silicone sensory chewing necklace is made of durable silicone material and can withstand strong chewing.