Dog Potty Training Bell Doorbell Adjustable for Housebreaking Housetraining Door

Features:
An easier, better way for your dog to communicate; Instead of hearing barking and scratching, you hear the gentle jingle of Zacro bells
Adjustable door bell length for small, medium and large dogs
Hang strong Zacro bells from any Doorknob or handle
Nylon adjustable doorbell strap and 7 piece 1.4" extra loud stainless stell bells
Specifications:
Materia:nylon
Size:Length 75cm/29.53''(adjustable)
Color: Black
Quantity: 1 pc
Note:
1.Transition: 1cm=10mm=0.39inch
2.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.
3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!