Q: I have sensitive ears. Why should I choice the titanium/925 Silver needle instead of 316L stainless steel? A: The needle of all our earrings sets is made of titanium/925 silver. Titanium has the advantages of high strength, light weight, rustless and non-toxicity, and its density is only 57% of stainless steel. Thanks to its good biocompatibility and corrosion resistance, titanium has become the first choice for medical products such as artificial joints, bone trauma, dental implants, artificial heart valves, and cardiovascular stents. These human organs made of titanium alloy can be well compatible with muscles, unlike 316L stainless steel that needs to be taken out after healing, otherwise the slight rust and heavy metal ions will cause human injury. Q: The backs of my earrings are too loose/tight, What should I do? A: If you feel the back of stud is a little loose or tight, please take the end down, then pinching it inward or loosening it outwards to adjust it.This is easy to do. You can also wear the butterfly earring backs along with the silicone rice backs. Q: What materials are these earrings made? A: The Base and the prongs are made of brass and plated with SILVER / 18K ROSEGOLD / 18K YELLOW GOLD. Our exquisite craft of plating makes sure a storage life of 10 years. The needle is made of Titanium/925 silver. All the materials are absolutely hypoallergenic.