14G(1.6mm) Blue Titanium IP Steel Circular Barbells Horseshoe Rings w/Spike Ends (Sold in Pairs) Metal: Titanium Ion Plated/Surgical Steel 4mm spike ends on the 3/8" & 5mm spike ends on the 1/2" Sold in Pairs 14 Gauge(1.6mm). 3/8" or 1/2" diameters available.