Straight union that joins two 1/4in air lines tube-to-tube, extending or splicing a run in an air-suspension or air-management system. Universal air-suspension hardware.
| Type | Tube union |
| Connections | 1/4in tube x 1/4in tube |
| Function | Air suspension |
| Fitment | Universal (air suspension) |
| Part Number | 21840 |
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