| Image | Item No. | Description |
| 32324 | Technic, Brick 4 x 4 Open Center
Catalog: Parts: Technic, Brick |
| 32531 | Technic, Brick 4 x 6 Open Center
Catalog: Parts: Technic, Brick |
| 32531c01 | Technic, Brick 4 x 6 Open Center with 2 Fixed Rotatable Friction Pins on End
Catalog: Parts: Technic, Brick |
| 32532 | Technic, Brick 6 x 8 Open Center
Catalog: Parts: Technic, Brick |
| 32532c01 | Technic, Brick 6 x 8 Open Center with 2 Fixed Rotatable Friction Pins on 3 Sides
Catalog: Parts: Technic, Brick |
| 62821a | Technic, Gear Differential 28 Tooth Bevel - Inner Tabs with Open Center
Catalog: Parts: Technic, Gear |
| 67491 | Technic, Liftarm, Modified Frame Thick 3 x 19 Open Center
Catalog: Parts: Technic, Liftarm |
| 64179 | Technic, Liftarm, Modified Frame Thick 5 x 7 Open Center
Catalog: Parts: Technic, Liftarm |
| 64179pb001 | Technic, Liftarm, Modified Frame Thick 5 x 7 Open Center with Warning Sign Pattern (Sticker) - Set 42082
Catalog: Parts: Technic, Liftarm, Decorated |
| 64179pb003 | Technic, Liftarm, Modified Frame Thick 5 x 7 Open Center with Warning Sign Pattern (Sticker) - Set 42097
Catalog: Parts: Technic, Liftarm, Decorated |
| 64179pb002 | Technic, Liftarm, Modified Frame Thick 5 x 7 Open Center with White Circles and Arrows on Red Background Pattern (Stickers) - Set 42054
Catalog: Parts: Technic, Liftarm, Decorated |
| 64178 | Technic, Liftarm, Modified Frame Thick 5 x 11 Open Center
Catalog: Parts: Technic, Liftarm |
| 64178pb001 | Technic, Liftarm, Modified Frame Thick 5 x 11 Open Center with Warning Sign Pattern (Sticker) - Set 42097
Catalog: Parts: Technic, Liftarm, Decorated |
| 39794 | Technic, Liftarm, Modified Frame Thick 7 x 11 Open Center
Catalog: Parts: Technic, Liftarm |
| 39790 | Technic, Liftarm, Modified Frame Thick 11 x 15 Open Center
Catalog: Parts: Technic, Liftarm |