18 gauge nose hoop constructed of solid 18k gold. Simply insert the opening of the hoop through the nostril. Twist and turn through piercing until the flat disc on the end is resting against the inner part of the nostril. Solid gold nose hoop in 18k gold.. Specifications: 18 Gauge (1mm), 5/16" (8mm), Solid 18K Gold, Handmade in USA, Handpolished