Safe Materials Chewing pen attachments made of food grade silicone, contain no mines, latex or phthalates, safe for health Our sensory chew fidget stimulation toys are convenient to clean and are perfect special tools for autistic pencil attachments for children can be easily cleaned by hand with hot water and soapy water or placed in the top rail of the dishwasher Box contents: 3-piece pencil topper set Stay calm and focus. The chewable silicone pen attachment is a perfect chewing tool to keep chewers with autism, special needs or sensory oral motor stimulation calm and concentrated Full durability and comfort: our durable fidgets pencil toppers for kids and adults are made of high quality silicone materials, full of durability and soft, more comfortable for children to chew