Check the listing for details. 4mm Clear Rubber Silicone Plastic Earring Backs Stopper Post Nut FREESHIP. Color: Clear, Condition: New. Listed at 1.60 USD. **Please note that there might be a slight color variation from picture. ALL IMAGES ARE ENLARGED TO SHOW DETAIL. Please make sure you know what size 4mm is, 4mm= 1/8 inch , don't wait until you receive it, tell me it's too small for you, ask for a return, no such request will be accepted.If you have any concerns, please contact us prior to purchase. There is no tracking service under $3 in the United States. Don't ask me for a tracking number. If you want to get the product quickly, please don't buy it. It usually arrives across the United States in 3-10 working days. Cherish each other's time, I provide my fastest service and you keep your patience.If you don't receive your mail within 10 business days, please contact me and don't open a case.Price and time are directly proportional, and you all know the service of USPS. Open case and negative feedback is very simple, you move your finger, but it hurts a kind heart. I hope that through communication with each other, we can make the world more positive. 2 pieces=1 PairsClear Plastic Rubber Earring Backs/ Earnuts/StoppersHypo-Allergenic4 mm Diameter4 mm Length1 mm Hole The 600-piece package additionally includes 5 free Gold and 5 Silver Metal Stoppers. USPS First Class Standard Mail (NO TRACKING)DO NOT EMAIL ASKING FOR TRACKING INFO ON FREE SHIPPINGFREEPLAIN WHITE ENVELOPE