This wheel is larger than the usual hamster wheels. Suitable for rats, guinea pigs, hedgehogs, etc. The wheel diameter is 200 mm. It does not require a lot of parts. For assembly, you will need 10 x M4_bolts, 10 x M4_nuts and 2 x bearings with an outer diameter of 32 mm and an inner diameter of 12 mm. The nuts can be secured with a soldering iron or a vice. Use petg with 50% intfill to get strong 3d printed parts.