Pet Lodge Mineral and Salt Spool is a delicious treat that your pet rabbit, guinea pig, hamster, ferret, or chinchillas will surely love. It contains white mineral oil and salt which will provide vital nutrients for your pet's good health. It comes with a handy clip to let you hang it anywhere inside the cage or wire hutch and allow your pets to eat freely according to their capacity. The spool is 2 in. diamter by 1 in. thickness while the wire hanger measures 1.5 in. wide by 2.75 in. high.