High-Quality Crystal Non Hot-fix Rhinestones - Poly BagCrystal non-hotfix flatback rhinestones with machine-cut crystals. The smooth flat back has no heat adhesive, so you apply each stone with craft glue such as E6000 or E7000 - ideal for fabric, garments, and hard surfaces like tumblers, shoes, phone cases, and home decor.Why CrystAX Crystal Non Hot-fix Rhinestones? Brilliant 12-16 facet machine cut for maximum sparkle Flat-back, glue-on design - bonds to fabric and hard surfaces alike Poly Bag packaging offers a large bulk quantity for high-volume production and studios Available in sizes SS4-SS50