Tegg 200 Pcs Gold Bullet Earring Backs Ear Nuts With Clear Rubber Hypoallergenic Tegg 200 Pcs Gold Bullet Earring Backs Ear Nuts With Clear Rubber Hypoallergenic Material:Metal/Rubber HYPOALLERGENIC - Because these earring backs are hypoallergenic they can be used with gold and silver earrings without causing an allergic reaction. 6-7mm 0.24 x 0.20 x 0.20 inches long, pad is 11mm wide. SUPER CONVENIENT - Never worry about losing those earring backs again!