Preciosa Genuine Czech Crystals, 360pcs in size ss16 (4 mm), HOTFIX clear Crystal, Viva Chaton Roses (Viva12 MC Rhinestone Iron-on Flatbacks), clear w/ Iron On Hot Fix Glue, 16ss Preciosa Czech Genuine Crystals, Machine Cut Chaton Rose VIVA12 Art. 438-11-612 (12 Facet FlatBacks, HOTFIX). Hotfix stones feature a special low-melting-point adhesive on the bottom of each stone. This glue is activated by heat at temperatures between 120C-170C (248F-338F) and bonds with the carrier material. The glue hardens as it cools and the stones are securely and permanently fixed. Stone Size: ss16 (4 millimeters). Stone sizes may get confusing. PLEASE CHECK SECOND IMAGE FOR SIZE COMPARISON Color: Crystal clear Please note smaller quantities are repacked in poly bags Select multiple items from "Crystals and BFF" to get combined or free shipping.