Freezdouble is a durable, fillable chew toy for dogs up to 140lbs. It's made from 100% natural rubber and is non-toxic and biodegradable. Veterinarians endorse it as a great training tool for dogs who love to chew. Freezdouble is easy to clean and dishwasher safe. Perfect Size: Freezdouble is available in one size, at 8.3' inches, making it the perfect refillable bone treat for dogs up to 140lbs. Fit moderate chewers