Key cover for 21mm round head keys for flex filament

Simple key cover for a key with a 21mm round head, print in flex/tpu filament

Needed a simple key cover for a small key with a 21mm round head. Noticed that several of my other keys had this size as well.

Turned out so small the phone had real trouble focusing on it.

Printing tips:

Nothing special, I used some old leftover Sainsmart TPU. Printed on a Prusa MK4 at 0.2mm layer height with a 0.4mm nozzle and standard 0.2mm SPEED settings, although choosing the Generic FLEX filament slows things way down. Probably worth doing a brim (I did) and printed on a smooth PEI plate with a glue stick.