PERFECT SIZE: About 5mm/0.2in in diameter, 4mm/0.16in thick, fit 0.7mm 21gauge post size. Note: Only usable for screw post and backs
925 STERLING SILVER PLATED BRASS: Made of 925 sterling silver plated brass, high polished and smooth surface, safe to use, lightweight and not easy to break and fade
1 BOX 30PCS EAR NUTS: You will get 30pcs screw earring backs, all storage in a small plastic box: 2.67 x 2.04 x 0.43inch(6.8 x 5.2 x 1.1cm), convenient to store and carry
EASY TO USE: Earring backs are in perfect size to hold it screw on/off on your stud earrings. Just twist front to the right to wear on and turn left to unscrew, suitable for 0.7mm 21 gauge screw post and backs
SCREW EARRING BACKS REPLACEMENTS: Silver screw earring backs is security, convenience and comfort. this special screw design allows you use it on your gorgeous diamond and pearl stud earrings safely and enjoy all the date and party