Each clip is designed to fit each unique brand of spool. It was designed for a .3 mm nozzle. It makes two perimeters with no fill. It may work with a 0.4 mm nozzle but I have not tried it yet. These are for 1.75 mm filament.
Hatchbox clip: shown on red filament spool
Maker Geeks clip: shown on green filament spool
Ultimaker clip: shown on black filament spool