CarbonDoser® CO2 Tubing:

• 8” length:
• Polyurethane tubing: CO₂ Resistant Tubing (8 foot length x 1/4” OD (outside diameter) perfect fit for all CO₂ accessories.
  (This is NOT hard/rigid plastic "RO" style tubing)
• It has a consistent Durometer reading of 95A: Which is proven perfect for John Guest “push-in” style fitting as well as the CarbonDoser® Checkvalve (below)

What is Durometer? Durometer or Shore Durometer is a standardized way to measure the hardness of materials like rubber (elastomers) and plastics.

Clear tubing VS colored tubing: We recommend that you resist the urge to use pretty colored tubing… If the checkvalve ever fails, you will have NO way to see the water or staining in the tubing.