Those things to help to put wires along frame made of 20x20 aluminium V-slot.
This kind of aluminum profile is popular, and here a lot of things of such kind. But profiles of different manufacturers have their own groove sizes. So it is often happened, the thing designed for another profile is too tight and does not fit or too small and doesn't hold in the profile at all.
So, those things I designed from scratch specially for 2020 profile of my Tevo Tarantula. I have printed dozen of version to bring it to perfection.
Those are:

• Hook 8mm (internal diameter) to secure bunch of wires.
• Hook 2 x 5mm to secure two bowdens, or bowden and set of wires or two bunches of wires.
• Flat cable holder to secure 10-wire flat cable or two of them one above another.
• Moldings 10, 20, 40 and 80 mm long. To cover wires passed inside V-slots, or just to decorate.