By Huu Khanh Nguyen · Updated October 29, 2026 · speed-rail, tube-fitting, flange, adjustable-flange
A cast oblong base plate with a slot at each end and a pivoting neck that carries a socket out from the plate, so a rail can be set at a slope.
| Name | Default | Unit |
|---|---|---|
| Tube outside diameter | 48.3 | mm |
| Socket bore | [49, 43].at([48.3, 42.4].indexOf(tubeDiameter)) | mm |
| Finish | white |