Thank you for viewing. Comes with 2 spare pieces. This is a chew toy for small animals such as degus, chinchillas, guinea pigs, and hamsters! They will work hard to spin it with their front paws once they get used to it, which is very cute! The wood uses solid wood and is not colored or painted, so it is safe for small animals. Materials: Frame: Lauan, Pieces: White pine, Rod: Ramin, Stopper fittings Body size: 105x50x27 The mounting plate is 30mm in size, so it can be attached to cages with wide mesh. Also, it can be attached to plastic cages if there is a hole of 5mm or more in diameter on the wall. Small scratches may remain from the manufacturing process. *The fourth photo shows the actual usage, although the product is different. Thank you.