Transparent silicone tube, one unit. Alternative method of fixation, compared to the rubber strap. Some users prefer this to the strap. Should be inserted into the holes in the front piece combo, and locked into the ridges at the bottom.
Honestly, I was skeptical at first, but once I figured out how to seat the tube properly into the front piece holes, it holds way more securely than any strap I've tried. The transparent material makes it easy to see if it's aligned, which is a huge plus for me.
Took me a few tries to get the tube seated properly in the front piece holes, but once it’s in, it holds way more securely than the rubber strap ever did for me. The transparency is a nice bonus since it doesn’t visually clash with the setup.
The whole installation took me under a minute once I figured out the hole alignment, and it holds way more securely than the rubber strap ever did. I like that I can see exactly where everything sits through the tube, which makes cleanup simple.