It is made of silicone.The tags are Non-Toxic, Eco-Friendly and Food Grade. Easy to clean, the dog ID tag stays looking brand new. A great promotions for pets suppliers. Measuring 1.14*1.53 inches, this custom bone shaped silicone dog tag. Usage Scenarios: Office supplies, school stationery, corporate promotions, trade show giveaways. We offer logo printing and full packaging customization. Product Highlights: Portable, durable, practical for daily use.