Pawliss Teeth Grinding Lava Block for Hamster Chinchilla Rabbit (Pack of 6) Natural lava rock, ideal material for rodent pets grinding their teeth Make the sharpness of their nails smooth as well Avoid your pet bites cage or furniture Lightweight, most pets will be able to push, toss, and roll it Dimension: 2"x2"x2" each cube, pack of 6