Product Details 14 Gauge 13mm Combo Wrench Barbell Nipple Ring Set Unleash your inner grease monkey and show your love for all this mechanical with these cute 14 gauge combo wrench nipple piercings! Made with 13mm durable 316L surgical grade stainless steel straight barbells, this set of nipple jewelry features an open ended spanner wrench on one side and a ring spanner wrench on the other. This bold set of nipple barbells is sold as a set of two. Specifications 14 Gauge (1.6mm), .51" (13mm) 316L Surgical Grade Stainless Steel Straight Barbells, Sold as a Pair