Match the outer dimension (OD) to your clamp, frame slot, or mounting hardware opening. The bore (ID) determines the hollow channel — a square bore is generally used for push rods or square inserts, while a round bore suits round rods or internal wiring. All tubes in this listing are 500mm (≈19.7") long. If you need a custom length, contact us before ordering.

Example: a 6×6mm OD tube with a 5mm round bore fits a 6mm square clamp and accepts a 5mm round rod through the center.

The hole type refers to the shape of the inner bore. A Square Hole bore is ideal for inserting square push rods, square carbon inserts, or linkage components that need anti-rotation. A Round Hole bore is suited for round rods, wiring, or standard round-section inserts. The outer profile is square on both options.

Carbon fiber composite tubes are generally significantly stiffer and stronger per unit weight than aluminum or fiberglass equivalents. For typical RC airplane spar and drone frame rail applications, these tubes handle the bending and vibration loads encountered in lightweight airframe construction. For load-critical engineering applications, contact us to confirm the specific fiber layup and resin specifications.

Carbon fiber itself does not rust or corrode, and the epoxy resin matrix provides good moisture resistance for typical outdoor RC use. These tubes are suitable for outdoor RC airplane and drone use in normal weather conditions. For prolonged submersion or exposure to harsh chemicals, additional sealing is generally recommended.

Yes. Carbon fiber tubes can generally be cut with a rotary tool fitted with a cutting disc, a fine-tooth saw, or a diamond-coated cutting wheel. Always wear a dust mask and eye protection — carbon fiber dust is an irritant. Sand cut edges smooth after trimming to prevent delamination at the cut face.

For micro and park-flyer RC models, the 1.4×1.4mm to 3×3mm sizes are typically sufficient. Mid-size sport models generally use 4×4mm to 6×6mm tubes. Larger or heavier builds often benefit from the 8×8mm to 12×12mm options. Always match the tube OD to the dimension specified in your build plan for best structural results.

These square carbon fiber tubes are designed to fit standard square tube clamps and frame slots used in RC airplane and drone construction. The outer dimensions (1.4mm through 12mm) correspond to common hardware sizing. Always verify that your clamp or connector's inner channel dimension matches the tube OD you select before ordering.