Product: 2 Pairs 925 Silver Secure Earring-Back Locking for Notched Post, 18K White Gold Plated Replacement Backing Hypoallergenic Guardian for Diamond Studs（7mm)
Brand: Siwoms
Color: Whtie Gold
  Alpa System Sterling Silver, Ear Nut. The secure choice for heavy large and precious earrings.     Similar mechanism to Guardian and La Poussette systems. Sold as a set of 2 pairs. Excellent choice of ear back.      Please note that the backs from these do not fit on a regular earring post,like screwback or plain post.Only fit on notched post with 0.75mm～1.0mm. 
💎【 Secure Locking, Small Earring Backs with Strong Spring Lock 】 Only Fit for (0.7～1.0)mm/(0.28～0.40)inch Notched Post Earring. Securely Spring Interlock, Squeeze Buttons to Lock on and off. Perfect Replacement for Diamond Studs Earrings with Notched Post (21 GAUGE ～ 18 GAUGE).
💎【 Hypoallergenic, No Allergic Reaction, No Irritation 】Nickel Free, Anti-Allergic, No itch and Irritation, Solid 925 Sterling Silver Earring backings with 18K Gold Plated.
💎【 No Fading, Keep Shining 】No Fading, with 200% Thicker 18K Gold Plated. Personalized Multi-color for Choice: White Yellow Rose Gold Available.
💎【 Comfort, No Pain, No Slip, Great Replacement, Fancy Gift 】La Pousette Locking Earring Security Backs, Comfy and Convenience. Smooth Curve Dual-tabs Button, No Pain Wearing, 7*9mm (0.28*0.40 inch) Big Large locking backings, Only Fit for (0.7～1.0)mm/(0.28～0.40)inch Notched Post. Nice Gift for Anyone, Any Accassion. Not for Plain Post of Earring!
💎【 Worry-free, Life-time Guarantee 】Hassle-free Service, Life-time Exchange or Money Back Warranty Unconditionally.

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