These 14G threaded replacement bioplast curved barbells are hypoallergenic, and you can trim them to the perfect length with a sharp pair of scissors! bioplast is increasingly a preference over surgical steel as its light weight, super comfy and will work with all 16G threaded jewelry - its self threading! You can use these barbells as replacement barbells for many belly rings, eyebrow rings...or pretty much any other 14G piercing. Barbell Size: 14 Gauge (1.6mm) Barbell Length: 5/16" (8mm) Brand: FreshTrends Age: Adult Condition: New