Septum Barbell

Plugyourholes.com

Circular barbell form factor matches exactly, Silver/metallic color matches exactly, Plain, round, metallic balls at the ends match exactly, Simple, unadorned design is consistent, Material appearance (metal) matches

18g, Very Tiny Balls, Septum, Tragus, 18g 6mm Circular Barbells 2mm Balls 316L, Small, Black, Gold, Rose Gold, Purple, Blue, Oil, Green - Etsy

Etsy

Visual design (circular barbell, small round balls), Color (silver/steel), Material (316L steel, plausible), Size (18g 6mm 2mm balls, plausible for delicate look)