Skip 18k gold sphere gem images slider 18K Gold Sphere Gem Sign-up to see price Product Info Made of 18K solid gold that is conflict free and hypoallergenic.NeoMetal threadless ends are universal and can be used with any of our threadless posts or barbellsManufactured in CAStainless steel pin is ASTM F-138 compliantNeoMetal products are covered against manufacturer defects. Learn more about our Limited Lifetime Warranty HERE