Bags on Board Black Bone dispenser is a compact refillable dispenser which houses a roll of 15 large bio-degredable doggie clean up bags. It attaches to any kind of leash - standard or retractable. Compact refillable waste pickup bag dispenser Attaches to any kind of leash - standard or retractable Houses a 15-bag roll With bags on Board, you'll always have bags with you. This dispenser comes with 30 bags.