Nothing too fancy about this - it is a ‘neck’ holder for the FACSFlow (sheath fluid) found on BD's FACS cytometers.
Someone had accidentally thrown away the actual BD issued one - so I figured I'd draft up a quick replacement in CAD! The STEP file is included, just in case anyone needs to make modifications!
Note: This works for the FACSFlow reference number 342003. (Not sure if there are any others - this is the only one we use in our lab…)