<VUR4>
Fabricated Parts must be made from legal Raw Stock. To be considered Raw Stock, the material must be obtained in one of the following forms before undergoing the fabrication processes listed in <VUR3>:| Type | Shape / Profile | Examples | |
| 1 | Sheet | Flat Plane | Sheet metal ⅛” polycarbonate sheet Plywood |
| 2 | Solid Billet | “Thick” rectangular beam / block | 4” x 4” x 6” solid aluminum billet 2” x 2” x 2” acetal block |
| 3 | Solid Bar | “Thin” rectangular beam | 2x4 wood planks ¼” x 3” aluminum bars |
| 4 | Hollow Bar | Hollow rectangular beam | 1” x 1”, 1/32” wall aluminum box tube |
| 5 | Solid Rod | Cylinder, Hexagonal or Rounded Hexagonal Stock | ¼” steel rod ¼” acetal rod VEXpro Hex Shaft |
| 6 | Hollow Rod / Tube | Hollow Cylinder, Drilled/Threaded Hexagonal or Rounded Hexagonal Stock | Copper tubing PVC pipe VEXpro ThunderHex Stock |
| 7 | Angle | 90° “L” shape | 1” x 1”, 1/16” thickness aluminum angle |
| 8 | U- / C-Channel | “U” or “C”. | 1/4” High x 1” Wide Aluminum U-Channel |
| 9 | Non-Metal 3D Printer Filament | Thin cylinder | PLA or TPU filament Composite nylon filament (e.g. Markforged OnyxTM) |
| 10 | Synthetic Polymer used for Molding | Liquid | Polyurethane Silicone |
| 11 | Solid Sphere | Solid (not hollow) uniformly rounded stock | Steel ball bearing Shaped wood finial |
Teams are not required to exhaustively define the specific material type for each component of every Fabricated Part in their Engineering Notebook, as it should be obvious from the engineering drawings required by <VUR7>. However, unusual parts should be expected to receive increased scrutiny. If any materials do not easily fall into one of these categories, then that is probably an indication that it is not intended to be a legal type of Raw Stock. If a Team cannot demonstrate that the component was made from a legal type of Raw Stock, then they will be asked to remove it from their Robot.