BodyJ4You Septum Barbell Mustache Barbell Stainless Steel 16G (1.2mm) or 14G (1.6mm) 16 Gauge stainless steel mustache septum jewelry measures 40mm in length. 16G (1.6mm) Measures 40mm in length. Septum Mustache 316L Surgical Steel Surgical Stainless Steel Septum High Polish Smooth Surface Septum Bar Piercing Body Jewelry.