📌 Standard Size Specification Rules
The numbers indicate [Inner Diameter (ID) / Outer Diameter (OD)] in millimeters (mm):
- 3/5 Tubing: Inner Diameter 3mm / Outer Diameter 5mm (Wall Thickness: 1mm)
- 4/7 Tubing: Inner Diameter 4mm / Outer Diameter 7mm (Wall Thickness: 1.5mm)
- 9/12 Tubing: Inner Diameter 9mm / Outer Diameter 12mm (Wall Thickness: 1.5mm)

💡 Recommended Applications & Usage
- 3/5 Tubing (Micro Size)
- Best For: Drip arrows, small drip emitters, potted plants, greenhouse nurseries, and seedbeds.
- 4/7 Tubing (Standard Size – Best Seller)
- Best For: Universal fit for hanging micro-sprinklers, ground-stake sprinklers, and residential garden watering systems.
- 9/12 Tubing (High-Flow Size)
- Best For: High-flow capacity needs, large-scale greenhouse micro-sprinkling, and orchard mist cooling.

⚠️ Important Compatibility Notice
Do NOT confuse PVC Micro Tubing with $\Phi$16 PE Drip Irrigation Mainline Pipes.
The fittings and connectors are NOT interchangeable. When purchasing fittings, simply specify your exact micro tubing size (3/5, 4/7, or 9/12).


📋 Comprehensive PVC Micro Hose Size Chart (Including Commercial & Landscaping Sizes)
Below is a reference guide for standard, heavy-duty, and commercial landscaping PVC tubing sizes:
| Model / Size Tag | Inner Diameter (ID) | Outer Diameter (OD) | Wall Thickness | Primary Application |
| 3/5 | 3.0 mm | 5.0 mm | 1.0 mm | Nursery Seedlings, Potted Drip Arrows |
| 4/7 | 4.0 mm | 7.0 mm | 1.5 mm | Standard Garden Micro-Sprinklers |
| 8/11 | 8.0 mm | 11.0 mm | 1.5 mm | Medium-Flow Engineering & Irrigation |
| 9/12 | 9.0 mm | 12.0 mm | 1.5 mm | Orchard Mist Cooling, Greenhouse Sprinklers |
| 12/16 | 12.0 mm | 16.0 mm | 2.0 mm | Landscape Garden Branch Lines |
| 16/20 | 16.0 mm | 20.0 mm | 2.0 mm | Main Feeder Lines / Commercial Landscaping |

🌿 Quality & Environmental Compliance
EU SVHC 197 Certified: Complies with EU REACH Regulation (tested and passed for 197 Substances of Very High Concern), ensuring eco-friendly and non-toxic agricultural safety.
100% Brand New Premium PVC Material: High flexibility, UV resistance, and weather durability.
