See photos & video. Black strap & silver bells to hang on door so dog can ask to go outside. Several snap positions to vary length. Comes in bag. well constructed. metal snaps, strong nylon strapping. I bet you can train a cat to use these too. its nice way for them to ask to be let out. listen in the video. I'm teaching my older dog to use them. You can teach an old dog new tricks it turns out. :) Fully extended 43", at first snap option it hangs about 35", next snap option about 33" and shortest option hangs about: 30" its new, I got it in a set & only needed one, so here's the other one :) (Note: the balm is not included in this listing, only the door bells, I had them in a listing together and seperated them- but please bundle bundle bundle :) its the best way to take advantage of your shipping label & get a nice discount to.) Happy dog= Happy owner.