Raniaco Dog DoorBells for Potty Training,Puppy Potty Training Dog Door Bell for Dog Housetraining,Dog Bell -Black 10% Off for Cyber Monday. Discount reflected at checkout. No promo code required.------------------------------------------------------Length: 39 Inches & The diameter of the bells: 1.1'' Made of Incredibly durablechew-resistant Nylon fiber and double-braid with the most delicate knitting machine 6 thick-walled jingle Bells and 2 bonus copper bells makes the sound more clear that you will not miss the moment when your puppy needs you Extra metal snap-fastener that fits any type of door handle The bells comes with our 100% satisfaction guarantee so order yours now with confidence