4 Pack Of Apple Trace Mineral Licks with Holders Safe, natural and fun treats for small pets. Included mineral licks holders fit any small pet's wire cage. Satisfy small pets' need for salt and other essential minerals. For rabbits, guinea pigs, chinchillas, pet rats, hamsters, gerbils and other small animals. (4 Pack) Ware Manufacturing Apple Mineral Lick Small Pet Chews with Holders. This salt and mineral chews are safe, natural and fun treats for small pets. They satisfy the natural craving for salt and supply essential minerals. Free holder included which fits any wire cage. Other shapes available. Measures 4-inch width by 3/4-inch depth by 6-3/4-inch height.