The soft TPU / Flex case snuggly wraps and holds the Ulanzi PT-10 Counterweight to prevent it from scratching other hardware that it's stored with.
The round inlet grabs onto the counterweight's thread and prevents it from slipping out.
The slit across the inlet adds flexibility to the shell and access to the counterweight.
Give it a good shake to release the counterweight's thread, or push it out.
I printed this model with TPU in vase mode, with a 0.6mm nozzle, 0.3mm layer height and 10 bottom layers.
The author marked this model as their own original creation.