Rope size: length 37.8in/width 0.8in.Bell diametre:1in DURABLE NYLON MATERIAL & EXTRA LOUD BELLS. Made from super strong thicker nylon ribbon to withstand the toughest tugs, scratches, and bites. The sleek silver coating jingle bells are sound great and durable to resist stress from the playful dogs. INSTEAD OF HEARING BARKING & SCRATCHING. All dogs have to go potty, doggie doorbell proven as an effective method for housebreaking, housetraining, potty training for your puppies, you can teach them how to signal you when they have to go.