What You’ll Get
✔ High-quality, 3D printable STEP models
✔ Your selected complete Metric, Imperial or Metric + Imperial collection
✔ Up to 48 standard tube diameter transitions
✔ Straight, concentric transition geometry without bend angles
✔ Compact face-to-face length: 25 mm (Metric) / 1 inch (Imperial)
✔ Snap-fit connection compatible with the Futuri Tube Mock-up Planner system
✔ Clearly marked tube diameter information
✔ Compatible with most FDM 3D printers
✔ Recommended 3D printing settings and instructions
✔ Instant digital download after purchase
Snap-Fit Modular Design
The straight stepped adapters are designed to work with the Futuri Tube Mock-up Planner system, allowing diameter transitions to connect with compatible snap-fit components.
The snap-fit connection makes it easy to assemble, inspect and adjust a physical representation of your tube layout before producing the final metal parts.
Unlike the angled Stepped Tube Adapter Mock-up Planner, these adapters maintain a common centerline between the two tube diameters. No bend angle or CLR selection is required.
Available Bundle Configurations
Choose from three complete collections using the Bundle selector above:
- Metric: All 28 metric transitions.
- Imperial: All 20 imperial transitions.
- Metric + Imperial: All 48 transitions.
The tables below show every available straight tube diameter transition included in each collection.
Metric Configuration Library — 28 Transitions
| Transition (mm) | Transition (mm) |
|---|---|
| 30 → 32 | 30 → 35 |
| 32 → 35 | 32 → 38 |
| 35 → 38 | 35 → 40 |
| 38 → 40 | 38 → 42 |
| 40 → 42 | 40 → 45 |
| 42 → 45 | 42 → 48 |
| 45 → 48 | 45 → 50 |
| 45 → 50.8 | 48 → 50 |
| 48 → 50.8 | 48 → 54 |
| 50 → 50.8 | 50 → 54 |
| 50.8 → 54 | 54 → 57 |
| 54 → 60 | 57 → 60 |
| 57 → 63.5 | 60 → 63.5 |
| 63.5 → 70 | 70 → 76.2 |
Imperial Configuration Library — 20 Transitions
| Transition (inch) | Transition (inch) |
|---|---|
| 1.250″ → 1.375″ | 1.250″ → 1.500″ |
| 1.375″ → 1.500″ | 1.375″ → 1.625″ |
| 1.500″ → 1.625″ | 1.500″ → 1.750″ |
| 1.625″ → 1.750″ | 1.625″ → 1.875″ |
| 1.750″ → 1.875″ | 1.750″ → 2.000″ |
| 1.875″ → 2.000″ | 1.875″ → 2.125″ |
| 2.000″ → 2.125″ | 2.000″ → 2.250″ |
| 2.125″ → 2.250″ | 2.250″ → 2.500″ |
| 2.500″ → 2.750″ | 2.750″ → 3.000″ |
| 3.000″ → 3.500″ | 3.500″ → 4.000″ |
All dimensions refer to the tubing outside diameter (OD). Every configuration features a straight, concentric transition without bend angles or CLR variations.
The Metric + Imperial Bundle includes every transition listed in both tables.
Why Choose the Complete Bundle?
Custom exhaust and tube fabrication projects often require different tubing diameters, depending on the application and available components.
With the Complete Bundle, you have an extensive collection of ready-to-print straight transition adapters available whenever you need them.
Rather than purchasing individual configurations for every new project, you can reuse the digital models across multiple fabrication projects while benefiting from the reduced bundle price.
Print as Many Pieces as You Need
Your purchase includes the digital models for your selected bundle. Print the adapters as many times as required for your own projects and fabrication work.
Instant Download
After purchase, your selected bundle is available as downloadable STEP ZIP files, together with the recommended 3D printing settings and instructions.
Depending on your selection, you will receive:
- Metric: One ZIP archive containing all 28 metric transitions.
- Imperial: One ZIP archive containing all 20 imperial transitions.
- Metric + Imperial: Both ZIP archives, containing all 48 transitions.
Digital Product & Licence
This is a digital download, no physical item will be shipped. You will need a 3D printer to make the final product.
The files are supplied for use in your own projects and workshop applications, subject to the Futuri Motion Tech digital product licence.
The digital files may not be shared, redistributed, uploaded for others to access, modified for redistribution, or resold without permission.
Intellectual property rights remain with Futuri Motion Tech.
For the full licence conditions, please see the Terms and Conditions.
