Descriptions: This item is made of stainless steel. The cage and ring are locked together with the lock. Once the lock is locked there really is no escape (unless you have the key). Features: Cage: 70mm in length, 32mm in diameter. Ring Size:1.97 inch/ 50mm To avoid injury or aggravation of pre-existing conditions, this product should not be used on bruised, swollen, or inflamed areas including skin lacerations. Discontinue use immediately if irritation or discomfort occurs. Cleaning: Use a mild soap and soft type brush (toothbrush) for cleaning.