| Shape | Best Axis | Description |
|---|---|---|
| Flat / U-type | X, Y | Common in horizontal slideways, accordion-style |
| Round Bellows | Z | Cylindrical, good for rotary or vertical movement |
| Tapered Bellows | Z | Narrow-to-wide for complex spindle assemblies |
| C-type Bellows | Y, Z | Mounted over guideways with side coverage |