100 Metre Silicone Tubing (6mm OD / 4mm ID)

Hailea Silicone Tubing / Air Line with an internal diameter (ID) of 4mm and an outside diameter (OD) of 6mm. Hailea BLACK Silicone Air Line Tubing. 4mm Internal Diameter is the standard size that fits most air pumps and air pumps.

• Will never harden crack or kink.
• Fits for air regulating valve and kinds of joint connector with its high precision.
• Remains kink-resistant for long periods and blending better.
• Its color also makes our tubing blending in the aquarium environment better.