☀Rhinestones material: Glass; Rhinestones More shiny. ☀Rhinestones technique: Hot Fix / Iron On (Hotfix glue is already on). ☀Rhinestones hotmelt glue, easy to apply with hot fix applicator wand or iron on your cloths,shoes,and other objects.Please do not compare the cheap resin or acrylic crystals nor black glue rhinestones with our gray glue glass rhinestones. ☀Rhinestones feature: dazzling brightness, strong glue, low defect, clear edge & corner, machine cut, high index of refraction. ☀We promise our rhinestones are shiny and will never dull out like other rhinestones. ☀Rhinestones quality Control: have better QC to inspect the goods from raw material to package with first-class quality. ☀Due to manual counting, there might be a slight error in the quantity. ☀Tips: The glue will start to melt at 150℃ or higher, can stick very well at 150℃-185℃. How to apply the hotfix rhinestones: - Preheat your hot fix applicator or iron. (Not included in the package); - Arrange hotfix crystals in desired pattern or place; - Apply the hot fix applicator or iron on the hotfix rhinestones, wait for around 10-15 seconds to melt the glue fully. - When the glue is heated, it melts, penetrating the fibre of the material. As it cools, the glue hardens and permanently affixes the hotfix crystal to the fibres. The temperature, application time and necessary pressure may vary depending on the fibre or material you choose.