Anything Flexible Flexible filament
This part is ment to safely hold a small 25v 470uF Rubycon or a big 35v 1000uF Rubycon capacitor.
It is also possible to hold any other capacitor its diameter is 10mm for small or 13mm for big holder and its not taller than 22mm.
This part is ment to be printed out of TPU, TPE or any flexible material. Tolerances are low so it fits snuggly.
Also ti put the cap inside, You have to flex the skewed part. This is a safety feature so cap wont slide out mid-flight.