Layer: 0.1 - 0.2 Support: yes Brim/Raft: depends on your machine What you Need: - one 608/Skateboard ball bearing (outer: 22mm inner: 8mm) On ebay: http://www.ebay.com/itm/Lot-10Pcs-Bearing-8mm-Skate-Scooter-Skateboard-Ball-Roller-Bearings-/292045752348?hash=item43ff48881c:g:mZ8AAOSwdGFYrP9a - 3x 12mm - 14mm Marbles