Green hose for external filters that use 16mm internal diameter tubing. Thicker than most other aquarium tubing which means it doesn't kink so easily. Cheaper tubing has a thinner wall and as a result quickly kinks especially when warm. This means your flow is drastically reduced and once a weakness is shown, it continually happens - this is why we only use this brand of tubing now. It's reliable.
Ideal for replacing Eheim tubing that has become dirty or old.
This product is sold per meter so if you need 3 meters, add 3 in the quantity box.
The 16mm refers to the internal diameter of the tubing.