Perfect diameter and length for WRX oil return. Fit perfect. I reused the Subaru clamps for this since they're easy to install without damaging the hose. The included clamps seem like they would be difficult to install and remove in the future.
Deteriorated within 5 min of use. One lap around the block popped my hood and saw the hose torn and ripped from the heat I ended up getting aerospace Tubing that I’ll never have a change the hose again also I recommend you using worm clamps instead.