Framar Y2K Pop Up Sheets are high-quality salon hair coloring foil sheets that come in a convenient pop-up dispenser box. The 500ct size indicates that there are 500 sheets in the box. These sheets are designed to make the hair coloring process easier and more efficient by allowing you to easily tear off the desired amount of foil and wrap it around the hair. The pop-up dispenser box also helps to keep the foil sheets organized and easily accessible during the coloring process. Overall, Framar Y2K Pop Up Sheets are a popular choice among hairstylists and are ideal for any hair coloring or highlighting technique.