Resun Quality Silicone Airline Tubing-authentic silicone air tube-Why choose silicone tube, instead of PVC tube? The flexibility of silicone tube would not change upon the environment temperature. that is different from PVC tube. Corrosion-resistant, suitable for saltwater. Long service lifetime. Specifications 4 mm ID. 1 mm thickness. suitable for all the aquarium air pumps, blowers, &, compressors. in continuous length.
