Enlarge image ↗The full 20-size range is shown for reference. Your custom set includes only your three or five selected guide-and-nut pairs.
Tube Cutting Guides — Build Your Own Set
Choose three distinct tube sizes from $24.98 or five from $39.98. Each selected size includes an orange PETG guide and matching nut, with front 3-fin and 4-fin marks.
- Pick 3 from $24.98
- Pick 5 from $39.98
- 20 tube sizes to choose from
- Orange PETG guides + nuts
Build your guide set
Choose Pick 3 or Pick 5, then a different tube size for each guide. Each selected size includes its matching orange compression nut.
Current dispatch estimate: about 4 days after ordering.Usually 2–3 days from order to dispatch. Timing varies with order size and our production queue; shipping transit time is additional.Estimate updated October 5, 2026.
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Available tube sizes
Choose three or five distinct sizes from this list. Each selected size includes its matching compression nut. The measurements are nominal tube outside diameters (OD), not the printed guide's outside diameter.
| Tube size | Tube OD (mm) |
|---|---|
| BT-20 | 18.6944 |
| BT-50 | 24.7904 |
| 29 mm thin-wall tube | 29.8704 |
| 29 mm thick-wall tube | 30.734 |
| BT-55 | 33.655 |
| 40 mm competition tube | 40.513 |
| BT-60 | 41.5798 |
| BT-70 | 56.3118 |
| 54 mm Apogee / LOC motor tube | 57.404 |
| BT-80 | 66.04 |
| LOC 2.56-inch body tube | 66.802 |
| 76.20 mm outside-diameter tube | 76.20 |
| LOC 3-inch body tube | 78.74 |
| 3-inch fiberglass tube fit | 79.248 |
| 80.00 mm outside-diameter tube | 80.00 |
| LOC 75 mm motor tube | 80.3148 |
| LOC 4-inch body tube | 101.6 |
| 4-inch fiberglass tube fit | 102.108 |
| 5-inch fiberglass tube fit | 130.81 |
| LOC 5.38-inch body tube | 140.716 |
Cutting and marking
- Match the tube. Choose the size that matches your tube's outside diameter. Slide it into position and tighten the matching compression nut to hold it.
- Use the front collar as your reference. Work with your own manual cutting tool suitable for the tube material.
- Mark the fin positions. Use the shared 0 reference, then the two 3 marks for a three-fin layout or the three 4 marks for a four-fin layout.
The three-fin pattern is spaced at 120°; the four-fin pattern is spaced at 90°. All marking positions are on the front collar. The compression nut rotates independently and has no fin-position scale.
Product details
- Included
- One guide body and matching nut for each chosen size: 3 pairs (6 pieces) or 5 pairs (10 pieces)
- Base prices
- Pick 3: $24.98; Pick 5: $39.98. Choose from 16 base sizes through the LOC 75 mm motor tube
- Larger sizes
- Add $5 for each LOC 4-inch or 4-inch fiberglass size; add $10 for each 5-inch fiberglass or LOC 5.38-inch size
- Size selection
- Distinct sizes within each set. To order another combination, add it as a separate set
- Color and material
- Orange PETG guides and matching orange nuts
- Marking positions
- 3-fin and 4-fin positions on the front collar, with a shared 0 reference
- Cutting tool
- Use your own cutting tool suitable for the tube material; no blade or cutter handle is included
- Product type
- Physical printed set; STL files are not included
Before you order
Match each selected tube name and measured outside diameter to the available-size list. Nominal motor and inch names are different from tube outside diameters. Fiberglass names identify dimensional fit; use a cutting tool appropriate for the tube material.
For a different tube manufacturer or an uncertain fit, send us the measured outside diameter before ordering.