1440pcs SS12 Crystal AB Flatback Rhinestones 3mm Glass Non Hotfix por | ago 4, 2026✨ 1440PCS SS12 Crystal AB Flatback Glass Rhinestones (Non-Hotfix). • Size:SS12 (3.0–3.2 mm). • Flatback design. ✅Flatback Style – Easy glue-on application. 2️⃣ Place flatback rhinestones onto adhesive.