Sold Individually. Please purchase a quantity of two (2) for a pair. 4 gauge plug body jewelry in a hollow tunnel design. Electro plated titanium cubic zirconia tunnel ear plug. Show off with this CZ plug. This sparkling titanium ear plug is sold individually.. Specifications: 4 Gauge (5mm), Electro Plated Titanium, 316L Surgical Grade Stainless Steel, Prong-Set Cubic Zirconia, One Rubber O-ring, Sold Individually. 4 Gauge Cz Gold Electro Titanium Tunnel Plug