3D Printable Tubes (No Supports Needed!)

# Fully 3D Printable Low-Poly Tubes (No Supports Needed!)

This is a parametric, 3D printable 8-sided hollow tube (octagon outer profile) optimized specifically for functional 3D printing. Traditional circular tubes or square pipes usually require messy internal supports or suffer from weak structural integrity due to layer lines. This design solves both problems completely.

## 🛠️ Design Features

* **Print Flat for Maximum Strength:** Designed to lay completely flat on its length side. Printing horizontally aligns the filament layers along the entire length of the rod, dramatically increasing its tensile and bending strength compared to tubes printed standing vertically.
* **100% Support-Free Internal Core:** The internal hollow cutout is a square rotated by 45 degrees. When lying flat, this forms a perfect diamond-shaped internal arch. The overhang angle never exceeds 45 degrees, allowing your printer to bridge the internal roof flawlessly without a single strand of support material